Studies have shown that behavioral changes and prescription medication can help older people fight insomnia. Researchers followed the sleep patterns of 72 people whose average age was 65. Seventeen people took a medication called temazepam an hour before bedtime, 18 people received training in techniques to improve sleep, 19 did both, and 18 took a placebo and received no training. The results are summarized inTable A.6.

Find the following proportions for this sample.
(a) The proportion who experienced much improved sleep quality.

(b) The proportion of those who took medication (with or without training) who experienced much improvement.

(c) The proportion of those with no improvement who used temazepam.

(d) The proportion of those who did not have training who experienced some or much improvement.

Transcribed Image Text:

Improvement Medication Training Both Neither Total Much Some None Total 10 22 16 34 72 4 5 3 3 17 18 17 18 19