A study conducted at Virginia Commonwealth University in Richmond indicates that many older individuals can shed insomnia through psychological training. A total of 68 insomnia sufferers averaging age 67 years old completed eight weekly sessions of cognitive-behavior therapy. After the therapy. 21 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. Answer

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