5 answers

Queston 44wvellamau brakerage fUm excautlye chaimned that 902 mvestons are (irently confident = meeliig their investment goals An XYZ Investor

Question:

Queston 4 4wvellamau brakerage fUm excautlye chaimned that 902 mvestons are (irently confident = meeliig their investment goals An XYZ Investor Oplunist Sutvcy cnndncted nver twu wcek period , found ual samoie people tnem said they are confident of meeting Eual te daim that the proportion peocle "ho are confident = largcr than 90% level 005 signiticance The null and altemnative Iypothesis would be: Ho: # 0.9 Ho:p 0,9 Ko:p 0.9 Hu:p Ho:p 0.9 Hu: p Hi:4+ 0.9 Hir 0.9 Ei:p Mi P 0.9 Hi:u Hi:# Tne test i5: left-talled right-tailed GYo-taileo The test statistic decimal Gerinulsi Yall Base UReject the hypothiesis Orail relect the nulI hypathesis Questlon Help: Amessage instructor


Answers

Construct the confidence interval for $p_{1}-p_{2}$ for the level of confidence and the data given. (The samples are sufficiently large.) a. $80 \%$ confidence, $$ \begin{array}{l} \mathbf{n}_{1}-300, \hat{p}_{1}-0.255 \\ \approx_{2}-400, \hat{p}_{2}-0.1 Q 3 \end{array} $$ b. $95 \%$ confidence, $$ \mathrm{w}_{1}-3500, \hat{p}_{1}-0.147 $$ $$ \mathrm{w}_{2}-3750, \hat{p}_{2}-0.131 $$

.

Into this lesson and this lesson we have this data to solve questions. Now we are looking at the best estimate for the population proportion trip. So the best estimate would be Yeah the number that Is for yes. All over the total number. And that is 5:31.

All over 1002. So In three small places water We have Joe on five two. Yeah Let's take for the small places they work on 5- 99. All right. That is the first pad the second part.

We are looking at the maiden of error. E. So the margin of L. E. C.

Call to the critical value. Mhm. Times the P. Do you have calculated then? Schools of that -1. The sample proportion all over the total number.

So when this let's look for the critical value. So we have The offer which is equal to 0.05. So this will become 04 and zero 25. Yes. Yeah.

So we are looking at about 1997.5 President of the area to the left. And let's find that from the table. So 97.5 97.5%. And that is here. So 1.9 last 0.06.

And that is 19. 1.96. Yeah. So with that we have on 96 times The P which you found us 0.5299 0.5299 one. Mine is their .5299.

All over one. There was there were two. Yeah. So with that we have and I post made value of the margin of error. Yeah.

Oh 0.0 Thursday Night that's the margin of error. The not as bad as to what write a statement that correctly interprets the confidence interval. The CPA do look at the confidence interval. Uh huh. So confidence interval, the proportion.

Mm hmm mm. Yeah. Now we have the interval like this. Mhm. Yeah.

You So that is 0.8-9 9 -0.0309. Mhm. Then we have a positive assemble that. Yeah. Mhm.

Yeah. Mhm. So 0.8-9 nine Uh 5 to other. You have a 52. Yeah.

Then if we subtract their zero 309 from it, that is 30.4 99. And here we have zero falling 56 08. Yes, so this is the confidence interval of the proportion the last part C Yeah, so we are interpreting this we uh 98% Uh was 95. So we are 95 questions confident that's the proportion. Okay, it's between yeah.

Oh 0.499, Cool. And their .5608. All right, so this is the data a operation thing. Thanks for the time. This is the end of the lesson.

The following is a solution to number four and we're asked to find the 99.5% confidence interval for the difference of two population means given the following data here, and we're gonna use a two sample T interval. The reason why we have to use a T intervals because the sample size isn't greater than 30. So if at least one of these is not Uh at least one of these sample sizes less than 30, then we've got to use the tea interval instead of the z interval. So I'm gonna use a tt for here. If you got a stat, There are over two tests and it's gonna be option zero.

So that's all the way down here where it says to samp t ent press center and just make sure data, I'm sorry, stats is highlighted and you can just punch in your data there. The confidence level is 00.995 stands for 99 99.5%. And then under pooled, you're just gonna want to keep that is Yes. The reason being, is that the two standard deviations are the same. Whenever that happens, then we have to have a pulled experiment And then we calculate in this top band here is our confidence intervals, so 10 4-9 and 14571.

Okay, so we're 99.5% confident that the true population mean difference is between 10 4-9 and 14 .571. Okay. Mhm. And part B. It's very similar.

We just want to be a little more confidence in 99.9% confident for the difference to population means again we're gonna use the tea interval because this 25 that's not greater than 30. So if we go to again stat and then tests and then the zero option. Now I actually have changed these because it's different data obviously. So 215 is the X one, bar seven is the standard deviation and 25 is that sample size? And then 1 85 is that I mean 12, is that standard deviation? And then 35 was the second sample size and we want to be .999. So 99.9% confident pull this still yes.

And then we calculate and we get between 20.713 and 39.287. Okay, So let's go and write that down. 27 13 all the way up to 39 0.28 7. 99.9% confident that the true difference of the population means is between these two numbers. Mhm.

The following is a solution to number three and we're asked to find the 99.9% confidence interval for the difference of two, population means given the following data here, and we're gonna use the two sample t interval, because one of these sample size is not at least 30. So in order to use the Z interval, we either need to know the population standard deviations, which is not usually very typical or at least one of the sample size is less than 30. And that's what happens here. So, I'm gonna use the T. I 84 here and if you just go to stat and then tests and then we're gonna scroll all the way down to the zero option where it says to samp T and that stands for two sample T interval, click enter and make sure stats is highlighted, and then you're just gonna pop in your data there.

So there's the main standard deviation sample size for the first sample mean standard deviation sample size for the second sample And the confidence level is .999, that stands for 99.9%. And then under pulled we're gonna keep that as a yes, because it says that we're assuming that the standard deviations are the same. So whenever that happens then we're just gonna assume that it's a pooled um appalled uh huh uh what do you call it? Topic or experiment? And when we calculate, we have .133 and .467. So that's our confidence in the rule. So we're 99.9% sure that the difference of the two means between 133 And .467.

Okay, so that's our confidence interval there. And then the second Part of this is a 99% confidence interval. Same thing. We're going to the t interval because that sample sizes less than 30 at least one of them is so we go to stat and then tests and it's the zero option And so we need to actually change the stuff. So 77.3 is the mean 1.2 is the first standard deviation and that sample size was 1875 was the second, I mean 1.6 was the standard deviation and then 32 was that sample size and we want to be .9999 Confident there.

And again we're gonna keep it as a yes pulled and we calculate so that's 1.1377-3.46-3. Okay, so one point 1377 234 6 to 3. So that's our 99% confidence interval for the difference of two, population means.

In this problem, we're testing for statistically significant difference in the mean waterfall. Heights between Europe and Asia were given a sample of size and nine for European waterfalls and nine Asian waterfalls as well without going through the tedium of showing you the actual calculations. The X bar for the European waterfalls is 883.2 feet. That's the X bar for the Asian waterfalls is 840 0.3. We are not given Population Sigma's, so we have to calculate those from the sample is well doing.

So we get for the European waterfalls. We get a sample standard deviation okay for 3 87.2 and for the Asian waterfalls for 77.7. Now, even though the sample size is less than 30 it's reasonably safe to assume that the underlying population of waterfalls in each continent is normally distributed, and so therefore, we can take our typical approach of developing a test statistic of the form sample. Me minus my hypothesized expected value of the mean standardized by dividing by the standard error right now are no hypothesis in this circumstance is simply that the population means are equal to each other and in this case are alternative hypothesis is that they are different. That is to say, we are not making any assumption about if they're different in what direction or which one would be greater or lesser.

We're simply saying they're either. Where are null hypothesis is that on average, waterfalls are justus high in Europe, as they are in Asia are alternative hypothesis is that they're not that there is a statistically significant difference between the two continents. That being the case are specific. Test statistic in this case turns into this right. The difference of the sample means minus the difference in the expected population means and divided by the standard error, which, based on sample standard deviations, looks like this.

But because our no hypothesis is that these two means air equal, this term is going to translate to zero will simply go away. So therefore, our test statistic is simply going to be. The difference in the sample means over this standard error formulation. Great now, because we're not taking a position on which direction which continent would be greater or lesser. This is a to tail test, and the book specifies that we use a 10% or Alfa equals 100.10 significance level right now for the student t distribution.

We need to know that the degrees of freedom of the distribution and in this case, degrees of freedom, is going to equal the lesser off the respective sample sizes each of minus one in each case. Now, in this case, both of sample sizes equal nine they're four degrees of freedom are nine minus one. In this case or eight, if I have a two tailed T distribution was an Alfa of 0.1 and eight degrees of freedom. This gives me my critical value. This could be looked up, a variety of ways to get this the critical values plus or minus one point feet +595 And therefore, if we were to visualize, this would have.

So any values of the test statistic falling in this range would result in are not rejecting the null hypothesis, which is to say we would not be able to say with any statistical significance that the mean waterfall heights are different between the two continents Now, as it turns out, if we took all of those values, we had up above and plugged it into the test statistic formula. We would come up with a T statistic in this case of 0.2093 which is approximately there and clearly in the range where we do not reject are no hypothesis..

Similar Solved Questions

5 answers
For a hydrogen atom in its ground state, use the Bohr model to compute (a) the orbital speed of the electron,(b) the kinetic energy of the electron, and (c) the electrical potential energy of the atom.
For a hydrogen atom in its ground state, use the Bohr model to compute (a) the orbital speed of the electron, (b) the kinetic energy of the electron, and (c) the electrical potential energy of the atom....
1 answer
A- Search Sheet Insert Page Layout Formulas Data Review View t Share A AutoSum » A-A Wrap Text Co...
a- Search Sheet Insert Page Layout Formulas Data Review View t Share A AutoSum » A-A Wrap Text Copy Fill Conditional Format Cell Formatting as Table Styles Insert Delete Format Sort & Format B I Clear A1 : x fc Given Data Case 08-29: CRAVAT SALES COMPANY 5Minimum ending cash balance $ 10,0...
5 answers
Walleye common gamie Itsh; Adult walleye nave length with , (nCur o/ 48 cm jnd J sturidard dcwallon 0l 3cm and the dlitrlbutton lengths appraximatcly Normal Use Normal Probablllty calculations (Minlab) Wdtn peicentare walleye shaltet Wtm Ienath? 45.2590 95.255 4.789 0 2596
Walleye common gamie Itsh; Adult walleye nave length with , (nCur o/ 48 cm jnd J sturidard dcwallon 0l 3cm and the dlitrlbutton lengths appraximatcly Normal Use Normal Probablllty calculations (Minlab) Wdtn peicentare walleye shaltet Wtm Ienath? 45.2590 95.255 4.789 0 2596...
1 answer
In Exercises 27–38, evaluate each function at the given values of the independent variable and simplify. $f(r)=\sqrt{r+6}+3$ $\begin{array}{llll}{\text { a. } f(-6)} & {\text { b. }} & {f(10)} & {\text { c. } f(x-6)}\end{array}$
In Exercises 27–38, evaluate each function at the given values of the independent variable and simplify. $f(r)=\sqrt{r+6}+3$ $\begin{array}{llll}{\text { a. } f(-6)} & {\text { b. }} & {f(10)} & {\text { c. } f(x-6)}\end{array}$...
5 answers
Differentiate the following Implicit function:x +y = 3xyShow your work in the textbox provided all steps in the process must be shown. An answer without work shown will not receive credit:Paragral |
Differentiate the following Implicit function: x +y = 3xy Show your work in the textbox provided all steps in the process must be shown. An answer without work shown will not receive credit: Paragral |...
1 answer
A block of mass m -2.00 kg collides head on with a block of mass m-...
A block of mass m -2.00 kg collides head on with a block of mass m- 10.0 kg initially at rest on a rough horizontal surface. The block m strikes m2 with a speed of 4.00 m/s. Immediately after the very brief inelastic collision, the 2.00 kg block bounces back with a speed of 1.20 m/s. Ignore the effe...
1 answer
The conceptual framework is with regards to the recognization of an asset according to the accounting...
the conceptual framework is with regards to the recognization of an asset according to the accounting field QUESTION UNICHEM LIMITED, a company listed in the industrial sector of the JSE Limited acquired new technological manufacturing equipment to enhance their Vanderbijlpark facility. This e...
5 answers
Solve for $oldsymbol{x}$ :If $an ^{-1} y: an ^{-1} x=4: 1$, express $y$ as an algebraic function of $x .$ Hence, prove that $an left(frac{pi}{8}ight)$ is a root of$x^{4}+1=6 x^{2}$
Solve for $oldsymbol{x}$ : If $ an ^{-1} y: an ^{-1} x=4: 1$, express $y$ as an algebraic function of $x .$ Hence, prove that $ an left(frac{pi}{8} ight)$ is a root of $x^{4}+1=6 x^{2}$...
5 answers
Cneiltmuleettencal onlicor Edrrplau urde E! aduute MuucItu Qainpieu 7Dg4 l0b In Ine Juruner 40Sl Wennie WnabamthenenultAenietnngahint Mialu Or tunt-Iretudonts Jreunotc Moehto Bat uuitciot Ipu Othadu2 Mat Mpicu ADl ct dennencaieharnniAnemnaln Wacly tO Kel y Eknniegiedtaar
Cneiltmuleettencal onlicor Edrrplau urde E! aduute MuucItu Qainpieu 7Dg4 l0b In Ine Juruner 40Sl Wennie Wnabamthenenult Aeniet nngahint Mialu Or tunt-Iretudonts Jreunotc Moehto Bat uuitciot Ipu Othadu2 Mat Mpicu ADl ct dennencaieharnniAnemnaln Wacly tO Kel y Eknniegiedtaar...
5 answers
Pt) For the equation given below; evaluate !' at the point (2,~2) 523y 322 =92Y at (2,-2)
pt) For the equation given below; evaluate !' at the point (2,~2) 523y 322 =92 Y at (2,-2)...
1 answer
Walowitz's Semiconductor’s, Inc. is considering the following two mutually exclusive investments: (20 points) Year Chip Maker...
Walowitz's Semiconductor’s, Inc. is considering the following two mutually exclusive investments: (20 points) Year Chip Maker 2000 Chip Refurbisher XE 0 ($195,000)* ($80,000) 1 60,000 (25,000) 2 60,000 70,000 3 60,000 70,000 4 60,000 (5,000) * Parentheses denote cash outflow If Walowitz&r...
5 answers
Which of the following series is convergent?(-1)" "=1 (1+(3)) "1=n + Vn "=1(1+4)" (" "1=3 Vn+4
Which of the following series is convergent? (-1)" "=1 (1+(3)) "1= n + Vn "=1 (1+4)" (" "1=3 Vn+4...
5 answers
Qreackn Assign or Z configurations cach oilcne below.Qreclor Circk ihe alkene the pair of alkcnes thgt Fculd morc #ele.
Qreackn Assign or Z configurations cach oilcne below. Qreclor Circk ihe alkene the pair of alkcnes thgt Fculd morc #ele....
5 answers
Can you do it backwards? How many 'formula units will be in 89.3 grams of Manganese (IV) carbonate? (Use E instead of x1O) Enter the number only this time: Proper significant digits. No units; No formulas.
Can you do it backwards? How many 'formula units will be in 89.3 grams of Manganese (IV) carbonate? (Use E instead of x1O) Enter the number only this time: Proper significant digits. No units; No formulas....
5 answers
Chapter 2, Section 2.2, Question 19Solve the initial value problemY =4y2 +xy2,y(0) = 1 and determine where the solution attains its minimum value.Enclose numerators and denominators in parentheses For example, (a _ bY (1 + n)y (x)Minimum value: x = Number
Chapter 2, Section 2.2, Question 19 Solve the initial value problem Y =4y2 +xy2,y(0) = 1 and determine where the solution attains its minimum value. Enclose numerators and denominators in parentheses For example, (a _ bY (1 + n) y (x) Minimum value: x = Number...
5 answers
6aNTJatk UauoniJLotoncMmulet 4 H 104e 55rblenidiIrninldb iolyomupi"Dimerru Jntter
6aNT Jatk Uau oniJ Lotonc Mmulet 4 H 104e 55rblenidi Irninl db iolyomupi"Dimerru Jntter...
1 answer
W=27f 31.3: Example Five infinite impedance voltmeters, calibrated to read rms values, are connected in the...
w=27f 31.3: Example Five infinite impedance voltmeters, calibrated to read rms values, are connected in the circuit as shown. Let R=2002, L=0.400 H, C=6.00 uF, and V=30.oven voltage am • What is the reading on each voltmeter at w=200 rad/s? What is the reading on each voltmeter at w=1000 rad/s?...
1 answer
24. from A water main is to be laid The water level in the tower is 150 ft above the ground. The ...
24. from A water main is to be laid The water level in the tower is 150 ft above the ground. The main must supply a maximum of 1000 gpm with a minimum of 5psig at the discharge end, at a temperature of 65°F. What size commercial steel sch 40 pipe should be used for the water main? If plastic pip...
5 answers
Which of the following; staternents is always Arue of an object at ejuilibrium? The object is at rest. The object % velocily ix not changing The net [orce on the objerct is Newtons. allol theso only Awo of thesekilograt is MucSuT of Au objext &weigtie.loreW4SSD) sizc.
Which of the following; staternents is always Arue of an object at ejuilibrium? The object is at rest. The object % velocily ix not changing The net [orce on the objerct is Newtons. allol theso only Awo of these kilograt is MucSuT of Au objext & weigtie. lore W4SS D) sizc....
1 answer
Which of the following factors is  not a reason forensic investigators are increasingly used in accounting? a...
Which of the following factors is  not a reason forensic investigators are increasingly used in accounting? a New accounting rules. b Pressure from boards of directors. c The Sarbanes-Oxley Act. d Audit fee increases. To ensure compliance with copyrights and to prot...
5 answers
Let g(x) = x2 4x+7 to find the following value. %3 9&-1
Let g(x) = x2 4x+7 to find the following value. %3 9&-1...
1 answer
On april 1st a consulting company recieved 24,000 in advance for services to be performed over...
On april 1st a consulting company recieved 24,000 in advance for services to be performed over the next 6 months. what is adjusting entry on june 3oth?...
5 answers
Decide if the following represents cis Isomer; trans isomet; or if cis-trans isomerism nol - possible for the substanca.CAnottung Honet Jrenetetnm nof posilbleSubmit AnswcrTry Anothor VeraionItem attompt romalning
Decide if the following represents cis Isomer; trans isomet; or if cis-trans isomerism nol - possible for the substanca. CAnot tung Honet Jrenetetnm nof posilble Submit Answcr Try Anothor Veraion Item attompt romalning...
1 answer
Since the reaction you wil perform is reversible, give two ways you could push the equilibrium in the forward direction in the laboratory.
Since the reaction you wil perform is reversible, give two ways you could push the equilibrium in the forward direction in the laboratory.experiment 6 background.pngexperiment 6 reaction and compounds.pngexperiment 6 mechanism.pngexperiment 6 methodolgy 1.pngexperiment 6 methodology 2.png...
1 answer
In 2017, Deon and NeNe are married filing jointly. They have three dependent children under 18...
In 2017, Deon and NeNe are married filing jointly. They have three dependent children under 18 years of age. Deon and NeNe’s AGI is $915,600, their taxable income is $838,100, and they itemize their deductions as follows: real property taxes of $14,800, state income taxes of $59,000, miscellan...
5 answers
Question 59 0f 75Which base IS overrepresented tumor contain more AP sites than in normal tissue DNA isolated from these AP sites?Answers . 44TyrosineGuaninaAceningCytosineNone
Question 59 0f 75 Which base IS overrepresented tumor contain more AP sites than in normal tissue DNA isolated from these AP sites? Answers . 44 Tyrosine Guanina Acening Cytosine None...
5 answers
Deternirie the systematic IUPACranefor the following molecules.
Deternirie the systematic IUPACranefor the following molecules....
1 answer
History Bookmarks People Window Help x X Files x Sia ScheduleAn x D inbox. Outi x...
History Bookmarks People Window Help x X Files x Sia ScheduleAn x D inbox. Outi x γ Your Shopp -Easy Money x x 3rd A anvas.ewu.edu/courses/ 1 1 62 436/files/folder/Spring%2020 1 7%20Exams?preview-43826 1 3 1 doc , Downloa Page of 6 -2OOM 7. The overall reaction for glycolysis is described by w...
5 answers
Capacitance represents the relationship between accumulatedcharge induced between a set of conductors and the appliedpotential difference. How would you expect the capacitance for aparallel plate capacitor to change as the area of the plates isincreased?
Capacitance represents the relationship between accumulated charge induced between a set of conductors and the applied potential difference. How would you expect the capacitance for a parallel plate capacitor to change as the area of the plates is increased?...
1 answer
Indicate true or false in each of the following statements: Transverse waves oscillate parallel to the...
Indicate true or false in each of the following statements: Transverse waves oscillate parallel to the wave velocity. Frequency is inversely proportional to wavelength, wave speed constant. The intensity of sound from a point source decreases as a square of the distance from the source. Sound waves ...
5 answers
According to the transportation model, what is the total shipment from Dallas?9504301,180750
According to the transportation model, what is the total shipment from Dallas? 950 430 1,180 750...
1 answer
An opinion or judgement formed before all the facts are known as termed
an opinion or judgement formed before all the facts are known as termed...

-- 0.093488--