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# Variances

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A real estate agent wishes to see if there is a difference in appraisal values given to homes by real estate appraisers and by tax assessors.

Real Estate Appraisers Tax Assessors
Means \$83,256 \$88,354
S \$ 3,142 \$ 2,341
N 15 15

Find the test value. ONLY!!!

In testing for a difference between the variances for the previous problem, the test value is: 1.342. What is the decision if the researcher tests for a difference in the variances at the 0.05 level of significance?

##### Solution Summary

A real estate agent wishes to see if there is a difference in appraisal values given to homes by real estate appraisers and by tax assessors.

Real Estate Appraisers Tax Assessors
Means \$83,256 \$88,354
S \$ 3,142 \$ 2,341
N 15 15

Find the test value. ONLY!!!

In testing for a difference between the variances for the previous problem, the test value is: 1.342. What is the decision if the researcher tests for a difference in the variances at the 0.05 level of significance?

##### Solution Preview

The Sample mean difference is Md=88,354-83,256= 5098
<br>The combined standard error is
<br>SE=SQRT[(SD^2+SD^2)/N] = SQRT[(3,142^2+ ...

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