So USA Today published a list of all the 50 states in the United States of America, along with their attacks for a gallon of gas. So let's pretend we have a list. So this this is not real data. This is just some things, um, going out of a hat right now just as an example. So let's say we start with Alabama and their tax gas is 25 and this is in sense.
So 25 cents again in Alice CA that might be lowered might be 15 cents for a gallon of gas. Arizona, for some reason, it would be more expensive. It's 33 cents a gallon and Arkansas might be 28 in California, Let's say 40 cents in Wisconsin. Ah, 22 in Wyoming, 26. So you have every 50 states, um, you add every tax, so you have 25 cents plus 15 again, the numbers are not really important.
It's what we're doing with them. So we add 15 and 33. And if yes, I'm gonna continue like this in 33 so on. And at the end you had 26 and you divide everything by 50 and you're left with 27.3. So 27.3 cents.
So what have we done? We've computed the mean of the packs for every state in America, the mean of the packs for a gallon of gas. That's the exact formula of for the mean. If we have wanted to be a little more Ah, rigorous. We could have used a more mathematical notation for table, so we could have said Okay, we have I goes from one to Baba Baba to 51 for every state and X, I is the tax for state eyes. So 25 15 40 and the mathematical regulars formula would have been I from 1 to 50 of for X I ah, and all of that divided by yes 50.
Yeah, so that's the scientific notation, if you will, the statistical notation of the formula for the mean. But you don't need to explicit really write the formula to understand the formula with so and showed you can just write a table and computer mean very easily, which is what we did with our dummy numbers. And if you wanted to be more rigorous, you could just say Well, if we represent every state tax by X, I being the first state in alphabetic, representing the order of the state in alphabetical order and we divide that some by 50 then you're left with the meat. But if you just add a bunch of number and you divide them by the total amount of number that you've added, you compute the mean of those numbers. So that's what we did..