5 Steps to a 5: 500 AP Statistics Questions to Know by Test Day by Anaxos Inc

Author:Anaxos Inc.
Language: eng
Format: epub
Publisher: McGraw-Hill Education
Published: 2020-03-09T16:00:00+00:00

(a) What are the point estimates for the proportion of families with children living below the poverty line in each neighborhood?

(b) Is there evidence of a difference between the two neighborhoods? Justify your answer.

387. As part of the development process for a retailers’ informational brochure, a company that owns a mall is studying the average amount of money that customers spend in its stores. A random sample of 127 customers spent an average of $215.67 with a standard deviation of $81.90. To determine whether it is appropriate to make the statement, “Our customers spend an average of more than $200 per visit,” a hypothesis test is performed, and a p-value of 0.0165 is found.

(a) State the appropriate null and alternative hypotheses to test the quoted statement.

(b) Explain exactly what the p-value represents in this situation.

388. Suppose that the data below were collected from a sample of gas stations in Indiana.

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