1 points

QUESTION 25

1. Major health studies try very hard to select a sample that is representative of the various ethnic groups making up the U.S. population. Here is the breakdown, by ethnicity, of subjects enrolled in a major study of sleep apnea:

White

4821

Hispanic

277

African American

510

Asian/Pacific

88

Native American

598

Total

6294

The known ethnic distribution in the United States, according to census data, is as follows:

White

0.756

Hispanic

0.091

Black

0.108

Asian/Pacific

0.038

Native American

0.007

Total

1

We want to know if the data from the sleep apnea study support the claim that the ethnicity of the subjects fits the ethnic composition of the U.S. population. What is the expected count of Hispanics under the null hypothesis?

277

25.207

572.754

152.72