Suppose that in a large population of students, the mean amount of sleep the previous night was ? = 7 hours and the standard deviation was ? = 1.6 hours. Consider randomly selected samples of n = 210 students. (a) What is the value of the mean of the sampling distribution of possible sample means? Mean = (b) Calculate the standard deviation, s.d., of the sampling distribution of possible sample means. (Round your answer to three decimal places.) s.d.(x) = (c) Use the Empirical Rule to find values that fill in the blanks at the end of the following sentence. (Round your answers to three decimal places.) For 68% of all randomly selected samples of n = 210 students, the mean amount of sleep the previous night will be between and hours.

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