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Essentials of Statistics for the B...

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

Solutions

Chapter
Section
BuyFindarrow_forward

Essentials of Statistics for the B...

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

For a 5-point treatment effect, a researcher computes power of p = 0.50 for a two-tailed hypothesis test with α = .05.

  • a. Will the power increase or decrease for a 10-point treatment effect?
  • b. Will the power increase or decrease if alpha is changed to α = .01?
  • c. Will the power increase or decrease if the researcher changes to a one-tailed test?

a.

To determine
If the power will increase or decrease for a 10-point treatment effect

Explanation

Given info:

The power of test for two tailed test with α=0.05 is p=0

b.

To determine

To explain: Whether the power will increase or decrease if alpha is changed to α=0.01

c.

To determine
Whether the power will increase or decrease in one-tailed test.

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