(Solution) - The file Utility contains the electricity costs in dollars during -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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The file Utility contains the electricity costs, in dollars, during July 2012 for a random sample of 50 one-bedroom apartments in a large city:

Decide whether the data appear to be approximately normally distributed by
a. Comparing data characteristics to theoretical properties.
b. Constructing a normal probability plot.