Sample Test 3 (sampling distribution)

Sample Test 3 (sampling distribution) - George Mason...

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George Mason University School of Management OM 210: STATISTICAL ANALYSIS FOR MANAGEMENT Professor Harvey Singer TEST #3: Inference and Regression (SAMPLE) Sampling Distributions of the Sample Mean Directions: Report all probabilities as decimals to 4 decimal places. Round z to 2 decimal places to use the standard normal table. Report calculated ages to 3 decimal places. A large supermarket chain employs over 9,000 people. It has been stated by the company that the mean age of all of its employees (the population) is 43.7 years with a standard deviation of 8.3 years. The company is thinking of introducing a healthcare package, and its insurance carrier wants to sample 48 employees before quoting a price. 1. Describe the sampling distribution of the sample mean in terms of (1) the numerical value of its mean, (2) the numerical value of its standard error of the mean, and (3) its shape (and you must explain why). 2. Suppose a single random sample of
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Sample Test 3 (sampling distribution) - George Mason...

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