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Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

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Chapter
Section
BuyFindarrow_forward

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

a. A researcher computes the regression equation for a sample of n = 25 pairs of scores, X and Y values. If an analysis of regression is used to test the significance of the equation, what are the df values for the F-ratio?

b. A researcher evaluating the significance of a regression equation obtains an F-ratio with df = 1, 18. How many pairs of scores, X and Y values, are in the sample?

a.

To determine
The d.f values for the F-ratio.

Explanation

Given info:

A researcher computes the linear regression equation for a sample of n=25 pairs of scores, X and Y values.

Calculation:

There are two d.f values for F-ratio as:

  • Degree of freedom for regression which is 1.
  • Degree of freedom for residual which is calculated as (n-2)

b.

To determine
The numbers of pairs of scores in the sample.

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