Question

Assignment 7: Problem 6 Previous Problem Problem List Next Problem (1 point) For each problem, select the best response. (a) The points on a scatterplot lie close to the line whose equation is y 3x 6. The slope of the line is B. 6 OC.9 D. 3 OE. None of the above. (b) Smokers don't live as long (on the average) as nonsmokers, and heavy smokers don't live as long as light smokers. You regress the age at death of a group of male smokers on the number of packs per day they smoked. The slope of your regression line A. must be between -1 and 1 B. will be less than zero O C. will be greater than zero. D. can't tell without seeing the data. (c) Fred keeps his savings in his mattress. He began with $600 from his mother and adds $200 each year. His total savings y after z years are given by the equation CA, y = 200 + 600z 600-200r B. y оС. У 2004г E. None of the above.

Answer 1

a)
regression equation y = 3x - 6
here slope is 3

Option D

b)
The age at death is negatively correlated with the number of packs per day smoked.
Higher the number of packs smoked per day lower the age at death or vice versa.

the slope cannot be decided without seeing the data
option D

c)
intercept = 600 and m = 200

y = 600 + 200x
option D