QUESTION 26

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. Software gives a chi-square statistic²= 7256.21 for these data. What is theP-value for this test?

Greater than 0.05

Less than 0.05 but greater than 0.01

Less than 0.01 but greater than 0.001

Less than 0.001