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A statistics teacher wants to see whether there is a statistically significant difference in the ages of day students and night students. A random sample of 31 students is selected from each group. The data are given below. Test the claim that there is difference in the mean ages of the two groups. Use α = 0.01.
Day Students:
22 24 24 23 19 19 23 22 18 21 2118 18 25 29 24 23 22 22 21 20 2020 27 17 19 18 21 20 23 26
Evening Students:
18 20 25 23 20 24 25 23 23 23 19 25 20 21 24 19 23 27 23 24 23 24 20 21 20 24 21 21 20 28 27
H0?: There is a difference in the mean ages of the two groups.
H1?: There is not a difference in the mean ages of the two groups.
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