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Suppose that we randomly select 50 billing statements from each of the computer databases of the Hotel A, the Hotel B, and the Hotel C chains, and record the nightly room rates. The means and standard deviations for the data are given in the table. Hotel A Hotel B Hotel C Sample Average ($) 140 160 125 Sample Standard Deviation 17.1 22.8 12.6 (a) Find a 95% confidence interval for the difference in the average room rates for the Hotel A and the Hotel B chains. (Use Hotel A - Hotel B. Round your answers to two decimal places.) $ -12.10 |× to s -27.90

Suppose that we randomly select 50 billing statements from each of the computer databases of the Hotel A, the Hotel B, and the Hotel C chains, and record the nightly room rates. The means and standard deviations for the data are given in the table. Hotel A Hotel B Hotel C Sample Average ($) 140 160 125 Sample Standard Deviation 17.1 22.8 12.6 (a) Find a 95% confidence interval for the difference in the average room rates for the Hotel A and the Hotel B chains. (Use Hotel A - Hotel B. Round your answers to two decimal places.) $ -12.10 |× to s -27.90

MATLAB: An Introduction with Applications
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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Suppose that we randomly select 50 billing statements from each of the computer databases of the Hotel A, the Hotel B, and the Hotel C chains, and record the nightly room rates. The means and standard deviations for the data are given in the table. | | Hotel A | Hotel B | Hotel C | |----------|---------|---------|---------| | Sample Average ($) | 140 | 160 | 125 | | Sample Standard Deviation | 17.1 | 22.8 | 12.6 | (a) Find a 95% confidence interval for the difference in the average room rates for the Hotel A and the Hotel B chains. (Use Hotel A − Hotel B. Round your answers to two decimal places.) - $12.10 to $27.90
Transcribed Image Text:Suppose that we randomly select 50 billing statements from each of the computer databases of the Hotel A, the Hotel B, and the Hotel C chains, and record the nightly room rates. The means and standard deviations for the data are given in the table. | | Hotel A | Hotel B | Hotel C | |----------|---------|---------|---------| | Sample Average ($) | 140 | 160 | 125 | | Sample Standard Deviation | 17.1 | 22.8 | 12.6 | (a) Find a 95% confidence interval for the difference in the average room rates for the Hotel A and the Hotel B chains. (Use Hotel A − Hotel B. Round your answers to two decimal places.) - $12.10 to $27.90
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