What is the test value? a sociologist wants to determine if, Ask an Expert

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What is the test value? 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:Sample mean 55.3,Population standard deviation 8.1, sample size 53
Asia: Sample mean 65.3, Population standard deviation 9.3, sample size 42
Calculate the critical value. Use a=0.05
a) -2.33 b)-2.58 c)-1.96 d) -1.65

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Category:- Statistics and Probability
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