For Exercise 2.91, see page 106; for 2.92 and 2.93, see pages 106–107; for 2.94 to 2.96, see page 108; for 2.97 to 2.99, see page 109; and for 2.100 and 2.101, see pages 111–112.

Question 2.105

2.105 Adequate sleep and exercise

Refer to the previous exercise.

sleep

  1. Find the distribution of exercise for those who get adequate sleep.
  2. Do the same for those who do not get adequate sleep.
  3. Write a short summary of the relationship between adequate sleep and exercise using the results of parts (a) and (b).
  4. Compare this summary with the summary that you obtained in part (c) of the previous exercise. Which do you prefer? Give a reason for your answer.

2.105

(a) For those who get enough sleep, 56.8% are high exercisers and 43.2% are low exercisers. (b) For those who don't get enough sleep, 37.9% are high exercisers and 62.1% are low exercisers. (c) Those who get enough sleep are more likely to be high exercisers than those who don't get enough sleep.