Regression analysis
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The Bradford Electric Illuminating Company is studying the relationship between kilowatt-hours (thousands) used and the number of rooms in a private single-family residence. A random sample of 10 homes yielded the following:
NUMBER OF KILOWATT
ROOMS HOURS
12 9
9 7
14 10
6 5
10 8
8 6
10 8
10 10
5 4
7 7
a. Determine the regression equation
b. Determine the number of kilowatt-hours, in thousands, for a 6 room house
Complete BOTH c & d correctly
c. Determine the standard error of estimate.
d. Suppose a large sample is selected (instead of just 10). About 95 percent of the predictions regarding kilowatt-hours would occur between what two values?
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Solution Summary
Step by step method for regression analysis is discussed here. Regression coefficients, coefficient of determination, scatter diagram and significance of regression model are explained in the solution.
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