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, Problem 4RE
A communications company has developed three new designs for a cell phone. To evaluate consumer response, a sample of 60 college students and 60 older adults is selected and each person is given all three phones to use for I week. At the end of the week, the participants must identify which of the three designs they prefer. The distribution of preference is as follows:
| Design 1 | Design 2 | Design 3 | ||
| Student | 27 | 20 | 13 | 60 |
| Older Adult | 21 | 34 | 5 | 60 |
| 48 | 54 | 18 |
- a. Do the data indicate that the distribution of preferences for older adults is significantly different from the distribution for college students’ Test with α = .05.
- b. Compute the phi-coefficient to measure the strength of the relationship.
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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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