Question

4. A health behaviors survey conducted in a large urban area includes a question about whether a person is a smoker. The company conducting the survey decides to increase the size of its random sample of survey participants from 1,500 people to approximately 20,000 people. This change will most likely have which of the following effects?

a. increasing the standard error of the estimate

b. decreasing the variability of the estimate

c. no effect on survey statistics because the population size is the same

d. increasing the confidence interval width for the parameter

Answer 1

The correct answer is

b. decreasing the variability of the estimate

Reasoning:

The company conducting the survey decides to increase the size of its random sample of survey participants from 1,500 people to approximately 20,000 people.Increasing sample size decreases standard error Thus, a is incorrect. option c is incorrect as sample size is important factor more the sample size closer is the estimate.