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Chapter 12: Q.31 (page 717)
What would you predict the sales to be on day 60?
The predicted sales on day will be
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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)
| x | y | x | y |
| 0 | 2 | 5 | 12 |
| 3 | 8 | 4 | 9 |
| 2 | 7 | 3 | 9 |
| 1 | 3 | 0 | 3 |
| 5 | 13 |
Whenand , is there a significant correlation? Explain.
56. The Standard Deviation for the Sum of Squared Errors for a data set is. What is the cutoff for the vertical distance that a point can be from the line of best fit to be considered an outlier?
The table contains real data for the first two decades of flu cases reporting
Find the correlation coefficient.
Enter your data into your calculator or computer. The pre- data should not be included. Why is that so?
The following table shows data on average per capita coffee consumption and heart disease rate in a random sample of \(10\) countries.
a. Enter the data into your calculator and make a scatter plot.
b. Use your calculator’s regression function to find the equation of the least-squares regression line. Add this to your scatter plot from part a.
c. Explain in words what the slope and y-intercept of the regression line tell us.
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