Question

For each of the following data sets, carry out a one-tailed t-test, with α = 0.05, and the alternative hypothesis ????????: U1 > U2

In each case, give the p-value (if applicable) or explain why the data are inconsistent with the alternative hypothesis. State whether or not the null hypothesis is rejected.

a) Sample 1: n=10 , mean= 10.8

Sample 2: n= 10, mean= 10.5 df= 18 SE= 0.23

b) Sample 1: n= 100, mean 750

Sample 2: n=100, mean= 730 df=180 SE= 11

c) Sample 1: n= 5, mean 500

sample 2= n=6, mean 560 df= 9 SE= 45

Answer 1