College

Data was collected from a simple random sample of 200 cell phone users age 18 or older in the United States. Each user was categorized by age group and by whether they use a certain cell phone app. The table shown summarizes the data, with expected cell counts in parentheses.

| | Uses Cell Phone App | | | |
|-------------------------------|---------------------|---|---|---|
| | Yes | No| Total |
| Age Group: Young Adults | 4 (15.2) | 76 (64.8) | 80 |
| Age Group: Older Adults | 29 (19.38) | 73 (82.62)| 102 |
| Age Group: Elderly Adults | 5 (3.42) | 13 (14.58)| 18 |
| Total | 38 | 162 | 200 |

Which statement is true about whether the conditions for a chi-square test for independence have been met?

A. All necessary conditions are satisfied to apply a chi-square test for independence between age group and texting use by cell phone users.

B. The data from the different age groups are not the result of independent random samples; therefore, the conditions for the test are not met.

C. The total sample size in one or more of the age groups is too small to meet the conditions of the chi-square test for independence.

D. Not all of the observed cell counts are large enough to satisfy the conditions for the chi-square test for independence.

E. Not all of the expected cell counts are large enough to satisfy the conditions for the chi-square test for independence.