In your sample, there are two groups of people: those who have a high school degree and those who have a bachelor's degree or higher. The following table shows the sample statistics of the two groups. You hypothesize that in general those who have a bachelor's degree or higher should earn more than those who have a high school degree. The estimated standard error is $360. Education Group 1 High school Group 2 BA or higher Sample size 361 mean $19,500 st.dev $3,800 169 $20,500 $3,900
Conduct a t-test at the .01 level.
Find the correct conclusion about the research hypothesis.
(A) Therefore, there is a statistically significant difference in the population
(B) Therefore, the population mean income of group 1 is statistically significantly smaller than that of group 2.
(C) Therefore, the population mean income of group 1 is statistically significantly greater than that of group 2.
(D) Therefore, there is NO statistically significant difference in the population mean income between the two groups.
(E) Therefore, the population mean income of group 1 is NOT statistically significantly smaller than that of group 2.
(F) Therefore, the population mean income of group 1 is NOT statistically significantly greater than that of group 2.
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