What is the best way to reduce sampling error in a study? (a) Select people from the population at random. (b) Increase the size of the study. (c) Calculate a 95% confidence interval for the results....

What is the best way to reduce sampling error in a study?

(a) Select people from the population at random.

(b) Increase the size of the study.

(c) Calculate a 95% confidence interval for the results.

(d) Use a more reliable instrument to measure exposure.