Hypothesis testing about a difference in population means between two groups 2. 1. Vincent is interested in whether work

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Hypothesis Testing About A Difference In Population Means Between Two Groups 2 1 Vincent Is Interested In Whether Work 1 (31.11 KiB) Viewed 107 times

Hypothesis testing about a difference in population means between two groups 2. 1. Vincent is interested in whether working-class families are more likely than middle-class families to maintain contact with kin. He collected a random sample of 500 US adults and asked their social class and how often they visit per year with close kin, Students who live in dormitories are significantly more involved in campus life than students who commute to campus. Based on his sample, he got the following sample statistics (16.5pts) Middle Class Working class X. = 7.3 8 = 8.2 S=13 N = 200 N = 300 $ 25 a) Using the significance level of 01. test the null hypothesis that the mean number of visits per year with close kin for working-class families is less than or equal to that for middle-class families. (Round all calculations to 3 decimal places) a) Is the difference between the difference in means observed between the samples statistically significant? Explain why, using the language of probability, 3 b) What is your conclusion? Is there a relationship between the variables statistically significant? Interpret the results in terms of the original research question.