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In statistical surveys where individuals are randomly chosen and asked​ questions, experience has shown that only...

In statistical surveys where individuals are randomly chosen and asked​ questions, experience has shown that only 26​% of those under 25 years of​ age, and 64​% of those aged 25 to 50 will​ respond, and  10​% of those over the age of 50 will not respond. A sociologist is to send a questionnaire to a group of​ people, of​ which: 28​% are younger than 25 years of​ age, 33​% are over the age of​ 50, the remainder are between the ages of 25 and 50 years of age. ​a) What will be the​ non-response rate​ here? That​ is, what percentage of all questionnaires distributed will not be responded​ to? ​b) If a questionnaire is responded​ to, what is the probability that the respondent is over the age of 50

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