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A large corporation sent out four groups of people to conduct observational studies on the average wait time at four different restaurants in its restaurant group. The restaurants have approximately the same ratings in terms of quality and popularity.

In their reports to the company board, each of the four groups described different methods used to conduct their studies, as shown in the table. Which group’s method will give the most accurate, unbiased results?

A large corporation sent out four groups of people to conduct observational studies on the average wait time at four different restaurants in its restaurant gro class=

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Answer:

It's midwest

Step-by-step explanation:

Midwest's groups will give the most accurate, unbiased results, and the correct option is B.

To solve this question, we analyze each sample, and find which of them will give the most accurate results.

  • Northeast: Only 3 hours a day, which can either have a very low or very high wait time, not being a correct representation, so there are bias factors.
  • West Coast: One full day, which also can be a day with a lot of demand, leading to high wait time, or a day with low demand leading do low demand time, so there are also bias factors.
  • South: Phone survey is not very accurate, people may not remember, for example.
  • Midwest: Consider lots of periods over the course of the week, thus surveying both periods of low and of high demand, to get a good estimate for the average time, not having bias factors.

Thus, the Midwest's groups will give the most accurate, unbiased results, and the correct option is B.

A similar example is given here:  https://brainly.com/question/16609573

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