Determine whether the data are qualitative or quantitative. Explain.
A list of debit card personal identification numbers

Identify the sampling technique used, and discuss potential sources of bias (if any). Explain.

Law enforcement officials stop and check the driver of every third vehicle for blood alcohol content.

Determine whether the statement is true or false. If it is false, rewrite it as a true statement.

A double-blind experiment is used to increase the placebo effect.

Determine whether the statement is true or false. If it is false, rewrite it as a true statement.

The method for selecting a stratified sample is to order a population in some way and then select members of the population at regular intervals.

You want to know the favorite spring break destination among 15,000 students at a university. Determine whether you would take a census or use a sampling. If you would use a sampling, determine which sampling technique you would use. Explain your reasoning.

Determine the level of measurement of the data set. Explain your reasoning.

The horsepowers of racing car engines

Determine whether the study is an observational study or an experiment. Explain.

Researchers conduct a study to determine whether cataract surgery patients experience different comfort levels during their first and second surgeries. Researchers based their results on a verbal questionnaire. (Source: Medicine)

Determine whether each number describes a population parameter or a sample statistic. Explain.

In a recent year, the average evidence-based reading and writing score on the SAT was 528. (Source: College Board)

Identify the sampling technique used, and discuss potential sources of bias (if any). Explain.

Questioning teachers as they leave a faculty lounge, a researcher asks 45 of them about their teaching styles.