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
Math   Statistics-And-Probability   
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