The U.S. Energy Information Administration claimed that U.S. residential customers used an average of 10,476 kilowatt hours (kWh) of electricity this year. A local powercompany believes that residents in their area use more electricity on average than EIA's reported average. To test their claim, the company chooses a random sample of153 of their customers and calculates that these customers used an average of 10,767 kWh of electricity last year. Assuming that the population standard deviation is2478 kWh, is there sufficient evidence to support the power company's claim at the 0.05 level of significance?Step 3 of 3: Draw a conclusion and interpret the decision.

The given information: The sample size, n = 153 The sample mean, x̄ = 10,767 The population…

Answered: The U.S. Energy Information…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.5: Interpreting Data

Problem 1C

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