1. Management at a retail store is concerned about the possibility of drug abuse by people who work there. They decide to check on the extent of the problem by having a random sample of the employees undergo a drug test. Several plans for choosing the sample are proposed. Name the sampling strategy in each.
a.) Randomly select an employee classification and test all the people who work in that classification - Supervisors, Full-Time Clerks, Part-Time Clerks, and Maintenance Staff.
b.) Choose the fourth person that arrives to work for each shift.
c.) There are four employee classifications: Supervisors, Full-Time Clerks, Part-Time Clerks, and Maintenance Staff. Randomly select ten people from each category.
d.) Each employee has a three-digit identification number. Randomly choose 40 numbers.
2 ? Explain why the first plan suggested above, sampling an entire classification, might be biased. Be sure to name the kinds(s) of bias you describe.
3. ?Name and describe the kind of bias that might be present if the management decides that instead of subjecting people to random testing they'll just...
a.) ?Hold department meetings and drug test the employees that attend.
b.) ?Offer additional employee discounts for those employees who agree to be drug tested