how much time do americans spend eating or drinking? suppose

 

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    1. How much time do Americans spend eating or drinking? Suppose for a random sample of 1001 Americans age 15 or older, the mean amount of time spent eating or drinking per day is 1.22 hours with a standard deviation of .65 hour.

      A) A histogram of time spent eating and drinking each day is skewed right. Use this result to explain why a large sample size is needed to construct a confidence interval for the mean time spent eating and drinking each day.

C) Determine and interpret a 95% confidence interval for the mean amount of time Americans age 15 or older spend eating and drinking each day.
D) Could the interval be used to estimate the mean amount of time a 9-year-old American spends eating and drinking each day? Explain.
2) A researcher wanted to determine the mean number of hours per week(Sunday through Saturday) the typical person watches television. Results from the Sullivan Statistics Survey indicate that s=7.5 hours
A) How many people are needed to estimate the number of hours people watch television per week within 2 hours with 95% confidence?

 

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