EBook Problems Infer 2Means Indep

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Revision as of 08:22, 2 December 2008

EBook Problems Set - Inferences About Two Means: Independent Samples Problems

Problem 1

A researcher wants to compare all students at Kansas State University (population = 22,000) with all residents of the city of Springfield, IL (population = 22,000). He wants to estimate the average age of each population using two separate samples. He wants the same margin of error for each of his sample means. How would the size of the two samples compare?

• Choose at least one answer.

(a) the sample sizes should be the same since the population sizes are the same.

(b) No way to tell.

(c) The KSU sample should be smaller than the Springfield sample.

(d) The KSU sample should be larger than the Springfield sample.

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