Essentials of Statistics for the Behavioral Sciences
8th Edition
ISBN: 9781133956570
Author: Frederick J Gravetter, Larry B. Wallnau
Publisher: Cengage Learning
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Chapter 15.5, Problem 1LC
- 1. A researcher completes a chi-square test for independence and obtains x2 = 6.2 for a sample of n = 40 participants.
- 2. If the frequency data formed a 2 X 2 matrix, what is the phi-coefficient for the test?
- 3. If the frequency data formed a 3 X 3 matrix, what is Cramer's V for the test?
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A researcher completes a chi-square test for independence and obtains X2 =6.2 for a sample of n=40 participants.
a. If the frequency data formed a 2 X 2 matrix, what is the phi-coefficient for the test?
b. If the frequency data formed a 3 X 3 matrix, what is the Cramer’s phi-coefficient for the test?
c. Explain why a very small value for an expected frequency can distort the results of chi-square test.
Resistors labeled as 100 Ω are purchased from two different vendors. The specification for this type of resistor is that its actual resistance be within 5% of its labeled resistance. In a sample of 180 resistors from vendor A, 150 of them met the specification. In a sample of 270 resistors purchased from vendor B, 233 of them met the specification. Vendor A is the current supplier, but if the data demonstrate convincingly that a greater proportion of the resistors from vendor B meet the specification, a change will be made. a) State the appropriate null and alternate hypotheses. b) Find the P-value. c) Should a change be made?
Consider the Cobb- Douglas production function, Q = aK^bL^c ; b and ca) Can be estimated using OLS on the equation Q = a +bK+cL
b) Can be calculated from the covariances of K and L with Qc) cannot be estimated using OLS
d) can be estimated using OLS on the equation log(Q) =log(a) +b log(K) +b log(L)
Chapter 15 Solutions
Essentials of Statistics for the Behavioral Sciences
Ch. 15.2 - For a chi-square test, the expected frequencies...Ch. 15.2 - Prob. 2LCCh. 15.2 - A researcher has developed three different designs...Ch. 15.3 - A researcher would like to know which factors are...Ch. 15.5 - 1. A researcher completes a chi-square test for...Ch. 15.5 - Prob. 2LCCh. 15 - Prob. 1PCh. 15 - Gven, Elaimis, Binokay, and Tan (2003) studied the...Ch. 15 - Prob. 3PCh. 15 - Data from the department of motor vehicles...
Ch. 15 - Research has demonstrated that people tend to be...Ch. 15 - Suppose that the researcher from the previous...Ch. 15 - Prob. 7PCh. 15 - Automobile insurance is much more expensive for...Ch. 15 - The color red is often associated with anger and...Ch. 15 - Research suggests that romantic background music...Ch. 15 - Mulvihill, Obuseh and Caldwell (2008) conducted a...Ch. 15 - Research has demonstrated strong gender...Ch. 15 - Prob. 13PCh. 15 - Prob. 14PCh. 15 - Prob. 15PCh. 15 - Prob. 16PCh. 15 - Research results suggest that IQ scores for boys...Ch. 15 - Gender differences in dream content are well...Ch. 15 - In a study similar to one conducted by Fallon and...Ch. 15 - A recent study indicates that people tend to...Ch. 15 - Research indicates that people who volunteer to...Ch. 15 - Although the phenomenon is not well understood, it...Ch. 15 - For the following scores. X Y 7 6 9 6 6 3 12 5 9 6...Ch. 15 - For the following data: X Y 1 2 4 7 3 5 2 1 5 14 3...Ch. 15 - A developmental psychologist would like to...Ch. 15 - A communications company has developed three new...
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