To explain: Reason it would not be wise to use these data to carry out a significance test about the mean amount spent by all shoppers at this supermarket.
Answer to Problem 99E
The sample is a convenience sample.
Explanation of Solution
Given information:
Consecutive shoppers:
Calculation:
The sample is a convenience sample, as the shoppers were “conveniently” chosen as
These shoppers who shop on the similar day of the week and on the similar time during the day, which means that we could exclude a part of the population.
The sample is then not representative for the total population.
Chapter 9 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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