Homework#9 - Stat 133 Autumn 2007 Homework #9 (10 points)...

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Stat 133 Autumn 2007 NAME Allison Heck Homework #9 (10 points) GROUP # __________ Due Tuesday Nov. 27 (at or before the beginning of recitation) 1. Let X have a normal distribution with mean μ x and standard deviation σ x . Suppose you take a random sample of size n and look at the sample mean X . What is the mean of X ? a. n x σ b. x c. n x μ d. x 2. Let X have a normal distribution with mean μ x and standard deviation σ x . Suppose you take a random sample of size n (n > 1) and look at the sample mean X . The standard deviation (aka standard error) of X is: a. The same as the standard deviation of X. b. Greater than the standard deviation of X. c. Less than the standard deviation of X. 3. Let X have any distribution with mean μ x and standard deviation σ x . Suppose you take a random sample of size n and look at the sample mean X . The distribution of X is: a. Exactly normal for any n. b. Approximately normal for any n because of the Central Limit Theorem.
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This note was uploaded on 02/16/2010 for the course STAT 133 taught by Professor Rumseyjohnson during the Fall '07 term at Ohio State.

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Homework#9 - Stat 133 Autumn 2007 Homework #9 (10 points)...

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