Purchase Solution

The Solution to Confidence Interval for Mean

Not what you're looking for?

Ask Custom Question

A sample of the math test scores of 35 fourth-graders has a mean of 82 with a standard deviation of 15.

Find the 95% confidence interval of the mean math test scores of all fourth-graders.

Find the 99% confidence interval of the mean math test scores of all fourth-graders.

Which interval is larger? Explain why.

Purchase this Solution

Solution Summary

Step by step method for t construction confidence interval for mean is discussed here. Excel template for each problem is also included. This template can be used to obtain the answers of similar problems.

Solution Preview

Please see the attachments.

A sample of the math test scores of 35 fourth-graders has a mean of 82 with a standard deviation of 15.
Find the 95% confidence interval of the mean math test scores of all fourth-graders.
Find the 99% confidence interval of the mean math test scores of all fourth-graders.
Which ...

Purchase this Solution


Free BrainMass Quizzes
Measures of Central Tendency

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

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.

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.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.