# Thread: P value calculation

1. ## P value calculation

I have zero idea what is going on with p values and would like some explanation on how to calculate them if at all possible. Here's an example question:

Assuming that the following sample arises from a Normal distribution with mean u and standard deviation sigma, where

sigma = 5.34, and the 12 samples are:

92.1, 94.6, 100.5, 95, 106.3, 91.4, 92.25, 93, 104, 105.5, 104, 109.1.

It was believed that the population mean u is 100. You tested the null hypothesis H0 : u = 100 against the two-sided alternative hypothesis H1 : u not equal to 100. What is the p-value?

2. ## Re: P value calculation

On the top of this page you will a link to the Normal Table (Standard Normal Table). Perform a Z-score test and look up your answer on such a table.

3. ## Re: P value calculation

Originally Posted by hlsmith
On the top of this page you will a link to the Normal Table (Standard Normal Table). Perform a Z-score test and look up your answer on such a table.
thanks do you know how to do a z score test? i have literally no knowledge on p values or z scores at the mo

4. ## Re: P value calculation

any help on that question would be appreciated!

5. ## Re: P value calculation

Have you performed a search on a one sample z score test yet? If so what are your questions?

6. ## Re: P value calculation

Originally Posted by hlsmith
Have you performed a search on a one sample z score test yet? If so what are your questions?
this is all going above my head, i have less than no idea how to tackle these types of questions, any help would be appreciated

7. ## Re: P value calculation

All you have to do is type "one sample z score test" into your internet browser and there will be lots of examples and definitions. Have you done this?

The formula that will pop-up is: .

Insert your numbers and calculate z-score:
xbar= mean of your numbers
mu = 100
and sigma xbar = 5.34

Next look-up z-score or type it into your internet browser. It doesn't seem like you are applying that much effort, since you just keep repeating yourself. Be specific about what you don't understand.

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