8. When people get married for the first time, the hushand is on aragn 2years de

Question

8. When people get married for the first time, the hushand is on aragn 2years de The standard deviation of the difference in age is roughly 2,5 years. that the distribution of the difference in age between the hushand and the wife in recently married couples (all first marriages) are to be selectod and the older than the wife. Suppose it i calculated (a) What noemal. Twelwe sverage difSerence in age is to be the correct notation for the statistic of internet? (b) What is the mean of the sampling distribution of the sample mean difference in age betwen the Imsband and the wife? (e) What is the standard deviation of the sumpling distribution of the sample mean difference in between the busband and the wife? 2.5 (d) What is the probability that the average age of the wives in the ssmple is older than the average age of the husbands? ' 998 Page 5

Explanation / Answer

8. When people get married for the first time, the hushand is on aragn 2years de The standard deviation of the difference in age is roughly 2,5 years. that the distribution of the difference in age between the hushand and the wife in recently married couples (all first marriages) are to be selectod and the older than the wife. Suppose it i calculated (a) What noemal. Twelwe sverage difSerence in age is to be the correct notation for the statistic of internet? (b) What is the mean of the sampling distribution of the sample mean difference in age betwen the Imsband and the wife? (e) What is the standard deviation of the sumpling distribution of the sample mean difference in between the busband and the wife? 2.5 (d) What is the probability that the average age of the wives in the ssmple is older than the average age of the husbands? ' 998 Page 5

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