Exercise: 1-Sample t-Test
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Question 1 of 1
1. Question
Data File: 1-Sample-T.MTW
Situation:An economist wants to determine whether the monthly energy cost for families has changed from the previous year when the mean cost per month was $200. The economist randomly samples 25 families and records their energy costs for the current year. Use the 1-Sample-T.MTW data file to determine if the mean of the 25 families’ energy cost is $200.
Question:
Has the mean energy cost for the 25 families changed from last year when it averaged $200?
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