In One Region, the September Energy Consumption Levels for Single

question 32

Multiple Choice

In one region, the September energy consumption levels for single -family homes are found to be normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh. For a randomly selected home, find
The probability that the September energy consumption level is between 1100 kWh and 1225 kWh.

• A) 0.2881
• B) 0.0910
• C) 0.3791
• D) 0.1971

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Definitions:

Sum

The total obtained by adding together a set of numbers or quantities.

ANOVA

Refers to Analysis of Variance, a statistical technique used to compare the means of three or more samples to find if at least one of them differs significantly.

T Test

A statistical test used to compare the means of two groups to determine if there is a significant difference between them.

F Ratio

The ratio of variance between groups to variance within groups in an ANOVA test, used to determine if there are significant differences between groups.