A nutritionist wants to determine how much time nationally people spend eating a

Question

A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 958 people age 15 or older, the mean amount of times spend eating or drinking per day is 1.23 hours with a standard deviation of 0.69 hour. Complete part(s) a through d) below. D. The requirements for constructing a confidence interval are not satisfied. d) Could the interval be used to estimate the mean amount of time a 9 year old spends eating and drinking each day? Explain. A. Yes; the interval is about individual time spend eating or drinking per day and can be used to find the mean amount of time a 9 year old spends eating and drinking each day. B. Yes; the interval is about the mean amount of times spent eating or drinking per day for people age 15 or older and can be used to find the mean amount of time spend eating or drinking per day for 9 year olds. C. No; the interval is about people age 15 or older. The mean amount of time spend eating or drinking per day for 9 year olds may differ. D. No; the interval is about individual time spend eating or drinking per day and cannot be used to find the mean time spend eating or drinking per day for specific age. E. A confidence interval could not be constructed in part(c)

Explanation / Answer

C is the right option for the question.

Why?
- because the interval is given for 15-year old not 9 year old
- because the confidence interval are for means and not individuals

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