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 olds amount of time spent eating or drinking per day is 1.23 hours with a standard deviation of 0.69 hour. Complete parts a) through d) below will be approximately normal. C. The distribution of the sample mean will never be approximately normal. D. Since the distribution of time spent eating and drinking each day is not normally distributed (skewed right), the sample must be large so that the temple mean will be approximately normal. (b) In 2010, there were over 200 million people nationally age 15 or older. Explain why this, along with the fact that the data were obtained using a random satisfies the requirements for constructing a confidence interval A. The sample size is greater than 5% of the population. B. The sample size is less than 5% of the population C. The sample size is less than 10% of the population D. The sample size is greater than 10% of the population

Explanation / Answer

a)As per central limit theorem, the mean of the sampling distribution will tend to normal with increase in sample size.

Hence Ans would be among a) or b) which says something like irrespective of the distribution,the mean will be approximately normal.

b)The sample size is less than 5% of the population.

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