Purchase Solution

Confidence interval for the difference in mean scores

Not what you're looking for?

Ask Custom Question

An investigator at a nearby university wants to find out from a recent "math skills" test if there is any difference in scores
between full-time and part-time students. Records show the following:

Student Mean Score Standard Deviation Number

Full-Time 83 12 45
Part-Time 70 15 55

Compute a 95% confidence interval for the difference in mean scores

Please see the attached file for full problem description.

Purchase this Solution

Solution Summary

Computes a 95% confidence interval for the difference in mean scores of full-time and part-time students.

Solution Preview

Please see thae attached file for the answer.

sx1-x2=standard error of the difference between two means=square root of (s1^2/n1 + s2^2/n2)= 2.7002
=square root of (12 ...

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

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.

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.