Prompt: Some people believe that female brains should have different volume from males. Given the data, your job is to perform the appropriate statistical test or procedure and help them decide.

Question

Question: I am having a hard time understanding the correct test to perform to give me the P-Value. Would the correct test be Regression, One-Sided T-Test, or Two-Sided? And in the future how would I know which of these test will give me the proper P-Value?

Answer 1

Z = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√n

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability.

Hope this helps.