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Chapter 12: Q. 18 (page 715)
Does the scatter plot appear linear? Strong or weak? Positive or negative?
The scatter plot shows that its not linear with positive correlation. It indicates that the plot is strong
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When testing the significance of the correlation coefficient, what is the null hypothesis?
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
Enter your data into your calculator or computer. The pre- data should not be included. Why is that so?
SCUBA divers have maximum dive times they cannot exceed when going to different depths. The data in Table 12.4 show different depths with the maximum dive times in minutes. Use your calculator to find the least-squares regression line and predict the maximum dive time for feet.
| X (depth in feet) | Y (maximum dive time) |
| 50 | 80 |
| 60 | 55 |
| 70 | 45 |
| 80 | 35 |
| 90 | 25 |
| 100 | 22 |
Does the scatter plot appear linear? Strong or weak? Positive or negative?
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