Find the sample size needed to estimate the mean age of movie patrons such that it can be said with 90% confidence that the sample mean is within 3 years of the population mean. Assume that the standard deviation is 19.3 years, based on a previous report. Could the sample be obtained from one movie at one theater? The required sample size is _______? Round up to the nearest integer.

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A:

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Q: You take all possible samples of size 100 from a very large population of values. The mean of the…

A: given data  n = 100 μ = 550σ = 50very large population  P(x¯>z) = 0.95x¯ = ?

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A:

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A:

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Q: Age of Senators The average age of senators in the108th Congress was 59  years. If the standard…

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A: answer is 0.88

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A:

Q: For a sample with a standard deviation of s = 12, a score of X = 42 corresponds to z = –0.50. The…

A: given data  s = 12 x = 42 z = -0.50 sample mean (M) = ?

Q: . sample mean x̄ ____________ B. sample standard deviation

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