Author Question: When the data form a 22 matrix, the phi-coefficient is used to measure effect size for the ... (Read 81 times)

leo leo · **on:** Jun 20, 2018

When the data form a 22 matrix, the phi-coefficient is used to measure effect size for the chi-square test for independence. If other factors are held constant, how does sample size influence the values for phi and chi-square?

a. A larger sample increases both phi and chi-square.
b. A larger sample increases phi but has no effect on chi-square.
c. A larger sample increases chi-square but has no effect on phi.
d. Sample size does not influence either phi or chi-square.

Question 2

A researcher selects a sample of 100 people to investigate the relationship between gender (male/female) and registering to vote. The sample consists of 40 females, of whom 30 are registered voters, and 60 males, of whom 40 are registered voters. If these data were used for a chi-square test for independence, what is the observed frequency for registered males?

a. 12 c. 40
b. 28 d. 42