his lest 10 pls possibl The table below summarizes results from a study of peopl

Question

his lest 10 pls possibl The table below summarizes results from a study of people who refused to answer survey questions. A pharmaceutical company is interested in opinions of the elderly What is the probability that the selected subject is someone 60 and over who responded? Age 18-21 22-29 30-39 40-49 50-59 60 and over Responded 76 Refused 248 139 141 205 59 13 2235 28 37 The probability that the selected subject is someone 60 and over who responded is (Round to three decimal places as needed) Enter your answer in the answer box View all solutions

Explanation / Answer

Total people responded = 76+258+248+139+141+205 = 1067

Total people refused = 13+22+35+28+37+59 = 194

Total people surveyed = 1067+194

= 1261

Probablity a person is 60 and over (P>=60) = (205 + 59)/ 1261

= 264/1261

= 0.209

Probabality is 60 and over and who responded,P(R) = 205 / 1261

= 0.163

Conditional probablity

P( slected person over 60 | responded ) = 0.163 / 0.209

= 0.779

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