How Long Is It? How good are you atestimating? To test a subjects ability to
Chapter 12, Problem 14(choose chapter or problem)
How Long Is It? How good are you atestimating? To test a subjects ability to estimatesizes, he was shown 10 different objects andasked to estimate their length or diameter. The objectwas then measured, and the results were recorded inthe table below.Object Estimated (inches) Actual (inches)Pencil 7.00 6.00Dinner plate 9.50 10.25Book 1 7.50 6.75Cell phone 4.00 4.25Photograph 14.50 15.75Toy 3.75 5.00Belt 42.00 41.50Clothespin 2.75 3.75Book 2 10.00 9.25Calculator 3.50 4.75a. Find the least-squares regression line for predictingthe actual measurement as a function of the estimatedmeasurement.b. Plot the points and the fitted line. Does the assumptionof a linear relationship appear to be reasonable?
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