Purchase Solution

What is the F-Test, with regards to variances in populations being the same?

Not what you're looking for?

Ask Custom Question

What is the F-Test, with regards to variances in populations being the same? (Include some examples)

A study of the effect of weathering on the radioactivity of granite was made by collecting a random sample of weathered rocks & another random sample of freshly exposed rocks. Measurements were made of the amount of radioactivity emitted in periods of one minute & the following data was obtained.

Fresh rocks 225 188 165 211 178 171 199
Weathered rocks 177 170 140 132 168 172 170

i) Examine the data for evidence of the effect of weathering & find a 95% confidence interval for the difference in mean radioactivity.
ii) State any assumptions you made in part i).
iii) Use an F-Test to justify one of the assumptions in part ii).

Purchase this Solution

Solution Summary

A 95% confidence interval is found for a set of data. An F-test is employed to verify assumptions. The solution is comprehensive.

Solution Preview

Please see the attached file for the complete solution.

A study of the effect of weathering on the radioactivity of granite was made by collecting a random sample of weathered rocks & another random sample of freshly exposed rocks. Measurements were made of the amount of radioactivity emitted in periods of one minute & the following data was obtained.
Fresh rocks 225 188 165 211 178 171 199
Weathered rocks 177 170 140 132 168 172 170

i) Examine the data for evidence of the effect of weathering & find a 95% confidence interval for the difference in mean radioactivity. ...

Purchase this Solution


Free BrainMass Quizzes
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.

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.