Question
For questions #47-50, refer to the following: A possible linear correlation between(x) hours of exercise per...
For questions #47-50, refer to the following: A possible linear correlation between(x) hours of exercise per week and (y) a person's cholesterol level was examined with the following results:
(x): 5 12 3 1 4 7
(y): 212 165 178 195 210 145
#47) What is the correlation coefficient?
| a. |
.87 |
|
| b. |
.63 |
|
| c. |
-.53 |
|
| d. |
-.43 |
|
| e. |
-.27 |
What percentage of a person's cholesterol level is directly related to their hours of weekly exercise?
| a. |
.28 |
|
| b. |
28.09 |
|
| c. |
45.25 |
|
| d. |
53 |
|
| e. |
3.67 |
What is the equation of the regression line?
| a. |
y = -.53 + 210 x |
|
| b. |
y = 154.87 - 5.24 x |
|
| c. |
y = 203.75 + 3.67 x |
|
| d. |
y = 203.75 - 3.67 x |
|
| e. |
y = 198.55 - 1.25 x |
Predict the cholesterol level for a person who exercises 7 hours per week?
| a. |
180.78 |
|
| b. |
Cannot predict a person's cholesterol level if they exercise 7 hours per week |
|
| c. |
212.22 |
|
| d. |
229.44 |
|
| e. |
178.06 |
Homework Answers
Answer #1
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