A consumer advocacy group is interested in gauging perceptions about food safety among professionals in the food industry. Specifically, they wish to determine the percentage of professional food preparers in the United States that believe food safety has improved. They use an alphabetized list of members of the organization Chef’s Collaborative and use Excel to generate a randomly shuffled list of the members. They then select members to contact from this list until they have succeeded in contacting 150 members.

a) What is the population?

b) What is the sampling frame?

c) What is the population parameter of interest?

d) What sampling method is used?