A publishing company is studying the sales of various franchises in their chain of stores. A researchercomputed 90%, 95%, 97%, and 99% confidence intervals for the population mean daily sales (indollars). Which of the following intervals is the the 95% confidence interval for the population meandaily sales?($5298.4, $6041.6)($5088.1, $6251.9)($5227.2, $6112.8)($5179.7, $6160.3)

Given The data is as follows: The 90%, 95%, 97% and 99% CI has been computed.

Answered: A publishing company is studying the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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When a population has less variability, for the same margin of error and confidence level, the confidence interval becomes a. larger b. smaller c. of unchanged size
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Answer D and E
You want to create a confidence interval for the difference in the percent of people over 40 who took music lessons as children and the percent of people 20-40 who took music lessons as children. You decide to use the Plus Four method. You ask 30 people over 40 and find that 21 of them took music lessons as children. You ask 25 people 20-40 and find that 13 took music lessons as children. Fill in the blanks for what you would put into your calculator's interval function. Have people over 40 be group 1. X1 = n1 = X2 = n2 =
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