Purchase Solution

Confidence Interval Construction

Not what you're looking for?

Ask Custom Question

Question:
June Walker is the Director of the Annual Fund for Marine Life University. She asks her analyst to study the giving patterns of the alumni of the School of Marine Sciences. Her analyst collects a random sample of 44 records and calculates an average annual participation in the Fund of 10.455 years. The standard deviation for annual participation is calculated to be 7.7 years. Based on this information, construct a 90% confidence interval for the average number of years of participation for the annual fund.

Purchase this Solution

Solution Summary

This solution constructs a 90% confidence interval for the average number of years of participation for the annual fund.

Solution Preview

Here is my explanation:

The critical value for the 90% confidence interval is 1.68 ( In this ...

Purchase this Solution


Free BrainMass Quizzes
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.

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.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

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