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Algebra

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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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Question

A marketing firm asked a random sample of people from a population how much they spend annually on oral hygiene products. The marketing firm then asked many other random samples of people from the same population the same question. The mean amount of each sample was computed, and then the mean of all the sample means was found to be $162.35. The standard deviation of all the sample means, or the standard error of the mean, was found to be $23.78. At a 95% confidence level, which values fall within the margin of error for the amount a person from the population spends annually on oral hygiene products? Select all that apply.