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Chapter 12: Q.42 (page 718)
Plot the two given points on the following graph. Then, connect the two points to form the regression line.
The graph:
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When testing the significance of the correlation coefficient, what is the null hypothesis?
Does the scatter plot appear linear? Strong or weak? Positive or negative?
The scatter plot shows the relationship between hours spent studying and exam scores. The line shown is the calculated line of best fit. The correlation coefficient is .
Do there appear to be any outliers?
Use the following information to answer the next five exercises. A random sample of ten professional athletes produced the following data where is the number of endorsements the player has and is the amount of money made (in millions of dollars).
draw the line of best fit on the scatter plot
The maximum discount value of the Entertainment® card for the “Fine Dining” section, Edition ten, for various pages is given in Table 12.21.
a. Decide which variable should be the independent variable and which should be the dependent variable.
b. Draw a scatter plot of the ordered pairs.
c. Calculate the least squares line. Put the equation in the form of: \(\hat{y}=a+bx\)
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