Sandra's marketing firm is advertising a new type of coffee for their client. As part of their market research, the firm randomly selects 40 adults from the tri-state area and ask them how much they spend annually on coffee. The sample mean is $178 and the sample standard deviation is $14. Based on this data, the manager of the firm claims that he believes the average annual amount spent on coffee by all adults in the tri-state area is less than $185. Is the manager correct? Test his claim at the 0.01 significance level.

Sandra's marketing firm is advertising a new type of coffee for their client. As part of their market research, the firm randomly selects 40 adults from the tri-state area and ask them how much they spend annually on coffee. The sample mean is $178 and the sample standard deviation is $14. Based on this data, the manager of the firm claims that he believes the average annual amount spent on coffee by all adults in the tri-state area is less than $185. Is the manager correct? Test his claim at the 0.01 significance level.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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