Introductory Statistics (10th Edition)
10th Edition
ISBN: 9780321989178
Author: Neil A. Weiss
Publisher: PEARSON
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Chapter 10.4, Problem 113E
a.
To determine
Findthe critical value.
b.
To determine
Findthe critical value.
c.
To determine
Find the critical value.
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The test statistic of z = -2.27 is obtained when testing the claim that p < 0.32
Part A: using a significance level a= 0.10, find the critical value(s)
The researchers reported:" A 2x2 ANOVA revealed, first of all, a main effect for depletion, indicating that depleted individuals generated less ideas (M = 9.40, SD = 5.64) than non-depleted individuals (M = 12.44, SD = 7.34), F (1, 108) = 6.03, p = .016, n2 = .05.
This effect was qualified by the expected interaction with [perseverance], F (1,108) = 4.52, p = .036, n2 = .05".
What size are the effects for the main effect of depletion and for the interaction between depletion and perseverance, according to Cohen's conventions?
a. These are small- to -medium effects
b. These are non existent effects
c. These are large effects
d. We are unable to tell from from the n2 / r2 statistics
Even a very small effect can be significant if the sample is large enough. Suppose, for example, that a researcher obtains a correlation (computed from the raw data) of r = 0.60 for a sample of n = 10 participants.
a. Is this sample sufficient to conclude that a significant correlation exists in the population? Use a two-tailed test with α = .05. In your response, be sure to specify the critical value for r.
b. If the sample had n = 25 participants, is the correlation significant? Again, use a two-tailed test with α = .05. In your response, be sure to specify the critical value for r.
Chapter 10 Solutions
Introductory Statistics (10th Edition)
Ch. 10.1 - Understanding the Concepts and Skills 10.1 Give an...Ch. 10.1 - Define the phrase independent samples.Ch. 10.1 - consider the quantities 1, 1, x1, s1 2, 2, x2and,...Ch. 10.1 - Discuss the basic strategy for performing a...Ch. 10.1 - In each of Exercises 10.510.10, we have stated the...Ch. 10.1 - In each of Exercises 10.510.10, we have stated the...Ch. 10.1 - In each of Exercises 10.510.10, we have stated the...Ch. 10.1 - Prob. 8ECh. 10.1 - In each of Exercises 10.5-10.10, we have stated...Ch. 10.1 - In each of Exercises 10.510.10, we have stated the...
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