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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