Refer to Exercise 3.11.
a. Use the data entry method in your scientific calculator to enter the six pairs of measurements. Recall the proper memories to find the correlation coefficient, r, the y-intercept, a, and the slope, b, of the line.
b. Verify that the calculator provides the same values for r, a, and b as in Exercise 3.11.
Reference:
A set of bivariate data consists of these measurements on two variables, x and y:
(3, 6) (5, 8) (2, 6) (1, 4) (4, 7) (4, 6)
a. Draw a scatterplot to describe the data.
b. Does there appear to be a relationship between x and y? If so, how do you describe it?
c. Calculate the correlation coefficient, r, using the computing formula given in this section.
d. Find the best-fitting line using the computing formulas. Graph the line on the scatterplot from part a. Does the line pass through the middle of the points?
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