Question

populations, samples and hypothesis
this quiz will test your knowledge on populations, samples and hypothesis.
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value 2
tyrone randomly interviewed 55 8th - graders at the westwood mall saturday afternoon to determine their reason for going to the mall. based on the results of his survey, he made the following claim:
two out of four middle - school students visit the mall to go shopping.
explain why this claim is misleading.
a. tyrone did not survey enough 8th - graders to draw a valid conclusion.
b. since tyrone surveyed only 8th - graders, his sample is not representative of all middle - school students.
c. tyrone only interviewed students in the food court.
d. tyrone did not use a random sample of 8th - graders.

Explanation:

Tyrone surveyed only 8th - graders at one mall on a specific day. His sample is not representative of all middle - school students as it excludes 6th and 7th graders and students who don't go to that mall on that day.

Answer:

B. Since Tyrone surveyed only 8th graders, his sample is not representative of all middle school students.