Recent questions in Descriptive Statistics

Z-Scores
Answered

airesex2
2022-05-01

Now, the "sample value" is defined by an equation. In my scenario, I have a bunch of stores that are reviewed by their customers. The customer amount varies. One store has 2 customers who give review while other store has 19 people who give reviews. For the 1st store in my example, both customers give 5/5. while the 2nd store customers, avg score given by all 19 customers is 4.

Sample value is calculated as score/customer count. So for the 1st store, it will be 5/2 while the other store will be 4/19. If I use that in z score eq. it will mean that first store is doing much better than the last store. I would like to know how to make the score "proportional""normalized""fair" etc...

Oh my many gods, I can't believe I ended like that. Thanks for pointing that out.

Z-Scores
Answered

Magdalena Norton
2022-05-01

When I used CLT (because the sample size is >30). I am getting a z score of 20? Is this correct?

Z-Scores
Answered

Alissa Hutchinson
2022-04-07

My attemp^

We are computing for the sample mean of our random sample that was given in the problem. By definition, $z=\frac{\overline{Y}-\mu}{\frac{\sigma}{\sqrt{n}}}$. So rewrite the equation so we can transform the data to make the mean 0 and the standard deviation 1. If I do that, I get,

$P(\frac{1.9-2}{\frac{2}{\sqrt{n}}}\le z\le \frac{2.1-2}{\frac{2}{\sqrt{n}}})\ge \mathrm{0.99.}$ This means that

$P(\frac{-0.1}{\frac{2}{\sqrt{n}}}\le z\le \frac{0.1}{\frac{2}{\sqrt{n}}})\ge \mathrm{0.99.}$ This also means that

$P(-0.05\sqrt{n}\le z\le 0.05\sqrt{n})\ge \mathrm{0.99.}$ I am not really sure what to do after this step. I am trying to use the definition of the normal distribution, however that was too difficult to do.

Do you guys know what to do after this step?

When you are majoring in subjects like Engineering, Sociology, or Economics, the chances are high that you will require descriptive statistics help, which basically stands for those cases when you need to provide more than calculations or statistical data that is presented in numbers. You may also require general help with the equations, which is why the list of answers presented will help you to proceed with your challenges. You can start with the bar graphs example We also list several descriptive statistics examples that will make it easier to understand how this part of statistics and probability works. In case you need to provide a