Use the following information for questions:
When people get married for the first time, the husband is, on average, 2 years older than the wife. The standard deviation of the difference in age is roughly 2.5 years. Suppose it is reasonable to assume that the distribution of the difference in age between the husband and the wife is normal. Twelve recently married couples (all first marriages) are to be selected and the average difference in age is to be calculated.
-What is the correct notation for the statistic of interest?
A) $\overline{x}_{M}$ - $\overline{x}_{F}$
B) $\overline{x}$
C) $\overline{d}$
D) $ µ_{d}$

Question

Use the following information for questions:
 When people get married for the first time, the husband is, on average, 2 years older than the wife. The standard deviation of the difference in age is roughly 2.5 years. Suppose it is reasonable to assume that the distribution of the difference in age between the husband and the wife is normal. Twelve recently married couples (all first marriages) are to be selected and the average difference in age is to be calculated.
-What is the correct notation for the statistic of interest?
A) $\overline{x}_{M}$ - $\overline{x}_{F}$
B) $\overline{x}$
C) $\overline{d}$
D) $ µ_{d}$

Quizplus · Accepted Answer

The statistic of interest is the average difference in age between husbands and wives, which is denoted as $\overline{d}$, where $d$ represents the difference in ages.

Use the Following Information for Questions: When People Get x‾M\overline{x}_{M}xM​

Use the Following Information for Questions:
When People Get $\overline{x}_{M}$