1) Consider the sampling examples provided below and indicate whether the sample is a convenience sample, simple random sample, stratified random sample, or cluster sample. (5 points each)
a. In an effort to identify if an advertising campaign has been effective a marketing firm conducts a nationwide poll by randomly selecting individuals from a list of known users of the product
b. A farmer divides his orchard into 50 subsections, randomly selects 4, and samples all the trees within the four subsections to approximate the yield of his orchard.
c. A survey regarding download time on a certain website is administered on the Internet my market research firm to anyone who would like to take it.
d. The Provost divides the Drexel student population into six classes first year, sophomore, pre- junior, junior, senior, and graduate student. The official takes a simple random sample from each class and asks the members opinion regarding student services.
e. To determine the average IQ of 9th grade students, a school psychologist obtains a list of all high schools in the local public school system. She randomly selects five of these schools and administers an IQ test to all 9th grade students at the selected schools.
f. A radio station asks its listeners to call in their opinions regarding the use of U.S. forces in the Middle East
g. To determine his DSL Internet connection speed, Sean divides up the day into four parts: morning, midday, evening, and late night. He then measures his internet connection speed at 5 randomly selected times during each part of the day
h. The Provost wishes to collect information on student opinion of cooperative education opportunities at Drexel University. He obtains a list of all registered undergraduate students at the university and randomly selects 50 students to complete a survey.
