posted by Barbara .
7. A sample of 40 observations is selected from one population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observations is selected from a second population. The sample mean is 99 and the sample standard deviation is 6. Conduct the following test using 95% level of confidence. Z-test for Unpaired data
A. Is it a 1 or 2 tail test
B. Compute the statistical calculation
C. What is your decision regarding H1
Ho = no difference
H1 = second mean < first
Do your Z test (see your statistics text) and accept or reject H1, depending on your level of significance used.