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Chapter 12: Q.32 (page 717)
What would you predict the sales to be on day ?
The predicted sales on day will be
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We are interested in whether or not the number of letters in a state name depends upon the year the state entered the Union.
a. Decide which variable should be the independent variable and which should be the dependent variable.
b. Draw a scatter plot of the data.
c. Does it appear from inspection that there is a relationship between the variables? Why or why not?
Write the equation: 欧= ____________
Enter your data into your calculator or computer. The pre- data should not be included. Why is that so?
Table 12.20 shows the life expectancy for an individual born in the United States in certain years.
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: \(\hat{y}=a+bx\)
Amelia plays basketball for her high school. She wants to improve to play at the college level. She notices that the number of points she scores in a game goes up in response to the number of hours she practices her jump shot each week. She records the following data:
| (hours practicing jump shot) | (points scored in a game) |
| 5 | 15 |
| 7 | 22 |
| 9 | 28 |
| 10 | 31 |
| 11 | 33 |
| 12 | 36 |
Construct a scatter plot and state if what Amelia thinks appears to be true.
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