A sociologist wants to determine if the life expectancy of people in Africa is less than the life expectancy of people in Asia. The data obtained is shown in the table below.
Africa Asia
Sample mean 55.3 65.2
Population standard deviation 8.1 9.3
Sample size 53 42
Test the claim at the .05 significance level.
a) State the hypotheses and identify the claim
b) Find the critical values
c) Compute the test values
d) Make the decision
e) Summarize the results