Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
Related questions
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.
- $128.30
- $203.36
- $112.73
- $206.04
- $107.88
- $189.85
- $210.92
- $101.17
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