Relationship between the average number of hours

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Problem: A study of men aged 20 to 40 investigated the relationship between the average number of hours of exercise per week x and average number of hours of sleep per day y. The regression line was found to be y=8.5-0.2x. Which of the following is a true statement?

a) For every additional hour of weekly exercise there is a corresponding 0.2 decrease in daily hours of sleep

b) We can correctly predict that a 60 year-old man who exercises 6 hours per week sleeps on average 7.3 hours per day

c) For every additional hour of weekly exercise there is a corresponding 8.5 increase in daily hours of sleep.

d) Increasing amount of weekly exercise causes a decrease in daily hours of sleep.

Reference no: EM132432398

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