# Project 10 KEY - Project 10(10 points Project 10 KEY...

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Project 10 (10 points) Project 10 KEY Chapter Ten: Hypothesis Testing A. The average monthly bill for cellular phone service is \$68. It is claimed that these costs are now decreasing. A survey yields the following data: 55 48 52 70 72 78 69 65 66 59 Test the hypothesis, at the α = 0.05 level of significance. .(May use MINITAB) 1.) Define the parameter(s) of interest. μ is the mean monthly bill for cellular phone service. 2.) State the null : ______ μ=\$68__________________________ State the Alternative : __ μ<\$68________________________ 3.) State assumptions, verifications, etc

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Project 10 (10 points) The Anderson-Darling Goodness – of – Fit Normality Test p-value = 0.791 > 0.05 implies that the sampled population is approximately Normal. Refer to box plot: no outliers. 4.) State the level of significance and the decision rule: α = 0.05; If the p-value is less than the level of significance then reject the Null Hypothesis; otherwise, do not reject the Null hypothesis. 5.)
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## This note was uploaded on 05/17/2010 for the course MATH 246 taught by Professor Applebaugh during the Spring '10 term at University of Arkansas Community College at Morrilton.

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Project 10 KEY - Project 10(10 points Project 10 KEY...

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