The following data show the average monthly utility bills for a random sample of households in Baltimore

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The following data show the average monthly utility bills for a random sample of households in Baltimore and for a random sample of households in Houston. (The bills include phone, television, Internet, electricity, and natural gas.)

Baltimore Houston Sample mean $390.44 $359.52 Sample size 33 36 Population standard deviation $64 $58

a. Perform a hypothesis test using a = 0.05 to determine if there is a difference between the mean utility bills in these two cities.

b. Determine the p-value and interpret the results.

c. Verify your results using PHStat.

AppendixLO1

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Business Statistics

ISBN: 9780133852288

2nd Edition

Authors: Robert A Donnelly, Robert Donnelly Jr

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