A study conducted at Virginia Commonwealth University in Richmond indicates that many older individuals can shed insomnia through psychological training. A total of 63 insomnia sufferers averaging age 67 years old completed eight weekly sessions of cognitive-behavior therapy. After the therapy, 31 participants enjoyed a substantially better night's sleep. Calculate the sample proportion of insomnia sufferers who did not enjoy a better night's sleep after the therapy. Round your answer to three decimal places, if necessary.
A study conducted at Virginia Commonwealth University in Richmond indicates that many older individuals can shed insomnia through psychological training. A total of 63 insomnia sufferers averaging age 67 years old completed eight weekly sessions of cognitive-behavior therapy. After the therapy, 31 participants enjoyed a substantially better night's sleep. Calculate the sample proportion of insomnia sufferers who did not enjoy a better night's sleep after the therapy. Round your answer to three decimal places, if necessary.
Chapter19: Externalities And Public Goods
Section: Chapter Questions
Problem 19.12P
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Transcribed Image Text:A study conducted at Virginia Commonwealth University in Richmond indicates that many older individuals can shed insomnia through psychological training. A total of
63 insomnia sufferers averaging age 67 years old completed eight weekly sessions of cognitive-behavior therapy. After the therapy, 31 participants enjoyed a
substantially better night's sleep. Calculate the sample proportion of insomnia sufferers who did not enjoy a better night's sleep after the therapy. Round your answer to
three decimal places, if necessary.
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