Purchase Solution

Random sample of 40 members of YMCA of South Jersey

Not what you're looking for?

Ask Custom Question

See Attachment.

Marty Rowatti recently assumed the position of director of the YMCA of South Jersey. He would like some current data on how long current members of the YMCA have been members. To investigate, suppose he selects a random sample of 40 current members. The mean length of membership of those included in the sample is 8.32 years and the standard deviation is 3.07 years.

Complete the following:

a What is the mean of the population?

b Develop a 90 percent confidence interval for the population mean.

c The previous director, in the summary report she prepared as she retired, indicated the mean length of membership was now "almost 10 years." Does the sample information substantiate this claim? Cite evidence.

Attachments
Purchase this Solution

Solution Summary

The expert prepares random samples of 40 members of YMCA of South Jersey.

Solution Preview

Please see attached word file.

Marty Rowatti recently assumed the position of director of the YMCA of South Jersey.
He would like some current data on how long current members of the YMCA have been
members. To investigate, suppose he selects a random sample of 40 current members.
The mean length of membership of those included in the sample ...

Purchase this Solution


Free BrainMass Quizzes
Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.