Problem

In the following problem, determine whether a straight line is a good model for the data....

In the following problem, determine whether a straight line is a good model for the data. You may do this either visually, by plotting the data points, or analytically, by finding the correlation coefficient for the least-squares regression line.

Natural Science The accompanying table shows the average monthly temperature (in degrees Fahrenheit) in Cleveland, Ohio, based on data from 1961 to 1990. Let x = 2 correspond to February, x = 4 to April, etc.

Month

Feb

April

June

Aug

Oct

Dec

Temperature

27.3

47.5

67.5

70.3

52.7

30.9

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Solutions For Problems in Chapter 2.3