Suppose a clinical psychologist sets out to see whether sexual orientation is related to relationship longevity. He decides to measure relationship satisfaction in a group of homosexual couples and a group of heterosexual couples. He chooses the Marital Satisfaction Inventory because it refers to “partner” and “relationship” rather than “spouse” and “marriage,” which makes it useful for research with both traditional and nontraditional couples. Higher scores on the Marital Satisfaction Inventory indicate greater relationship satisfaction. The psychologist administers the Marital Satisfaction Inventory to 53 couples—23 are homosexual couples and 30 are heterosexual couples. He wants to calculate the correlation between a couple’s relationship satisfaction and sexual orientation. Which of the following types of correlations would be most appropriate for the psychologist to use? A point-biserial correlation A Spearman correlation A phi-correlation A Pearson correlation To calculate the correlation, the psychologist converts “sexual orientation” to a dichotomous variable. Suppose the data for the first 5 couples he surveys are shown in the table that follows. By assigning zero (0) to homosexual couples and one (1) to heterosexual couples, complete the table. Sexual Orientation Marital Satisfaction Inventory Score Sexual Orientation (Converted) homosexual 20 homosexual 41 heterosexual 18 heterosexual 46 homosexual 32 Suppose the psychologist calculates the correlation using the data as coded in the previous table. Then, he recalculates the correlation, but this time, instead of assigning zero (0) to homosexual couples and one (1) to heterosexual couples, he reverses the codes and assigns one (1) to homosexual couples and zero (0) to heterosexual couples. Which of the following statements is true regarding his two calculations of the correlation? The signs of the two correlations are opposite, but their absolute values are the same. The two correlations are the same. The absolute values of the two correlations are different. Before calculating the correlation, the psychologist does an independent-measures t test comparing the Marital Satisfaction Inventory scores of homosexual couples and heterosexual couples. The value of the t statistic is -1.27 with 51 degrees of freedom. Using this information, the square of the point-biserial correlation is r² = .

Suppose a clinical psychologist sets out to see whether sexual orientation is related to relationship longevity. He decides to measure relationship satisfaction in a group of homosexual couples and a group of heterosexual couples. He chooses the Marital Satisfaction Inventory because it refers to “partner” and “relationship” rather than “spouse” and “marriage,” which makes it useful for research with both traditional and nontraditional couples. Higher scores on the Marital Satisfaction Inventory indicate greater relationship satisfaction. The psychologist administers the Marital Satisfaction Inventory to 53 couples—23 are homosexual couples and 30 are heterosexual couples. He wants to calculate the correlation between a couple’s relationship satisfaction and sexual orientation. Which of the following types of correlations would be most appropriate for the psychologist to use? A point-biserial correlation A Spearman correlation A phi-correlation A Pearson correlation To calculate the correlation, the psychologist converts “sexual orientation” to a dichotomous variable. Suppose the data for the first 5 couples he surveys are shown in the table that follows. By assigning zero (0) to homosexual couples and one (1) to heterosexual couples, complete the table. Sexual Orientation Marital Satisfaction Inventory Score Sexual Orientation (Converted) homosexual 20 homosexual 41 heterosexual 18 heterosexual 46 homosexual 32 Suppose the psychologist calculates the correlation using the data as coded in the previous table. Then, he recalculates the correlation, but this time, instead of assigning zero (0) to homosexual couples and one (1) to heterosexual couples, he reverses the codes and assigns one (1) to homosexual couples and zero (0) to heterosexual couples. Which of the following statements is true regarding his two calculations of the correlation? The signs of the two correlations are opposite, but their absolute values are the same. The two correlations are the same. The absolute values of the two correlations are different. Before calculating the correlation, the psychologist does an independent-measures t test comparing the Marital Satisfaction Inventory scores of homosexual couples and heterosexual couples. The value of the t statistic is -1.27 with 51 degrees of freedom. Using this information, the square of the point-biserial correlation is r² = .

Understanding Business

12th Edition

ISBN:9781259929434

Author:William Nickels

Publisher:William Nickels

Chapter1: Taking Risks And Making Profits Within The Dynamic Business Environment

Section: Chapter Questions

Problem 1CE

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Question

The psychologist administers the Marital Satisfaction Inventory to 53 couples—23 are homosexual couples and 30 are heterosexual couples. He wants to calculate the correlation between a couple’s relationship satisfaction and sexual orientation. Which of the following types of correlations would be most appropriate for the psychologist to use?

A point-biserial correlation

A Spearman correlation

A phi-correlation

A Pearson correlation

To calculate the correlation, the psychologist converts “sexual orientation” to a dichotomous variable. Suppose the data for the first 5 couples he surveys are shown in the table that follows. By assigning zero (0) to homosexual couples and one (1) to heterosexual couples, complete the table.

Sexual Orientation	Marital Satisfaction Inventory Score	Sexual Orientation (Converted)
homosexual	20
homosexual	41
heterosexual	18
heterosexual	46
homosexual	32

Suppose the psychologist calculates the correlation using the data as coded in the previous table. Then, he recalculates the correlation, but this time, instead of assigning zero (0) to homosexual couples and one (1) to heterosexual couples, he reverses the codes and assigns one (1) to homosexual couples and zero (0) to heterosexual couples. Which of the following statements is true regarding his two calculations of the correlation?

The signs of the two correlations are opposite, but their absolute values are the same.

The two correlations are the same.

The absolute values of the two correlations are different.

Before calculating the correlation, the psychologist does an independent-measures t test comparing the Marital Satisfaction Inventory scores of homosexual couples and heterosexual couples. The value of the t statistic is -1.27 with 51 degrees of freedom. Using this information, the square of the point-biserial correlation is r² = .

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