EP INTRODUCTION TO PROBABILITY+STAT.
14th Edition
ISBN: 2810019974203
Author: Mendenhall
Publisher: CENGAGE L
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Textbook Question
Chapter 11.5, Problem 11.12E
Assembling Electronic Equipment An experiment was conducted to compare the effectiveness of three training programs. A, B, and C, in training assemblers of a piece of electronic equipment. Fifteen employees were randomly assigned, five each, to the three programs. After completion of the program, each person was required to assemble tour pieces of the equipment, and the average length of time required to complete the assembly was recorded. Several of the employees resigned during the course of the program; the remainder were evaluated, producing the data shown in the accompanying table. Use the Excel printout to answer the questions.
Excel printout to answer the questions.
a. Do the data provide sufficient evidence to indicate a difference in
b. Find a 99% confidence interval for the difference in mean assembly times between persons trained by programs A and B.
c. Find a 99% confidence interval for the mean assembly times for persons trained by program A.
d. Do you think the data will satisfy (approximately) the assumption that they have been selected from normal populations? Why?
MS Excel output for Exercise 11.12
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Test d'égalité des espérances: observations pairées
A television news channel samples 25 gas stations from its local area and uses the results to estimate the average gas price for the state. What’s wrong with its margin of error?
You’re fed up with keeping Fido locked inside, so you conduct a mail survey to find out people’s opinions on the new dog barking ordinance in a certain city. Of the 10,000 people who receive surveys, 1,000 respond, and only 80 are in favor of it. You calculate the margin of error to be 1.2 percent. Explain why this reported margin of error is misleading.
Chapter 11 Solutions
EP INTRODUCTION TO PROBABILITY+STAT.
Ch. 11.5 - Prob. 11.1ECh. 11.5 - Prob. 11.2ECh. 11.5 - Prob. 11.3ECh. 11.5 - Prob. 11.4ECh. 11.5 - Prob. 11.5ECh. 11.5 - Prob. 11.6ECh. 11.5 - These data are observations collected using a...Ch. 11.5 - Prob. 11.8ECh. 11.5 - Prob. 11.9ECh. 11.5 - Reducing Hostility A clinical psychologist wished...
Ch. 11.5 - Prob. 11.11ECh. 11.5 - Assembling Electronic Equipment An experiment was...Ch. 11.5 - Prob. 11.13ECh. 11.5 - Prob. 11.14ECh. 11.5 - Prob. 11.16ECh. 11.5 - The Cost of Lumber A national home builder wants...Ch. 11.6 - Prob. 11.19ECh. 11.6 - Prob. 11.20ECh. 11.6 - Prob. 11.21ECh. 11.6 - Prob. 11.22ECh. 11.6 - Prob. 11.23ECh. 11.6 - Prob. 11.26ECh. 11.8 - Prob. 11.28ECh. 11.8 - Prob. 11.29ECh. 11.8 - Do the data of Exercise 11.28 provide sufficient...Ch. 11.8 - Prob. 11.31ECh. 11.8 - Prob. 11.32ECh. 11.8 - Prob. 11.34ECh. 11.8 - The partially completed ANOVA table for a...Ch. 11.8 - Gas Mileage A study was conducted to compare...Ch. 11.8 - Prob. 11.38ECh. 11.8 - Prob. 11.39ECh. 11.8 - Digitalis and Calcium Uptake A study was conducted...Ch. 11.8 - Bidding on Construction Jobs A building contractor...Ch. 11.8 - Premium Equity? The cost of auto insurance varies...Ch. 11.8 - Prob. 11.43ECh. 11.8 - Prob. 11.44ECh. 11.10 - Prob. 11.45ECh. 11.10 - Prob. 11.46ECh. 11.10 - Prob. 11.47ECh. 11.10 - Prob. 11.48ECh. 11.10 - Prob. 11.49ECh. 11.10 - Demand for Diamonds A chain of jewelry stores...Ch. 11.10 - Terrain Visualization A study was conducted to...Ch. 11.10 - Prob. 11.52ECh. 11.10 - Prob. 11.53ECh. 11.10 - Prob. 11.54ECh. 11.10 - Prob. 11.55ECh. 11 - Prob. 11.56SECh. 11 - Prob. 11.57SECh. 11 - Prob. 11.58SECh. 11 - Prob. 11.59SECh. 11 - Prob. 11.60SECh. 11 - Prob. 11.61SECh. 11 - Prob. 11.62SECh. 11 - Prob. 11.63SECh. 11 - Prob. 11.64SECh. 11 - Prob. 11.65SECh. 11 - Prob. 11.66SECh. 11 - Prob. 11.67SECh. 11 - Yield of Wheat The yields of wheat(in bushels per...Ch. 11 - Prob. 11.69SECh. 11 - Professor’s Salaries In a study of starting...Ch. 11 - Prob. 11.71SECh. 11 - Prob. 11.72SECh. 11 - Prob. 11.73SECh. 11 - Prob. 11.74SE
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