Instructor-created question Question Help The table below summarizes results fro

Question

Instructor-created question Question Help The table below summarizes results from a study of people who refused to answer survey questions. Use the table to answer the following questions. Be very careful to read the question carefully to determine whether or not there is overlap. Age 18-21 22-29 252 40-49 133 28 30-39 50-50 135 37 60 and over 199 50 Responded 70 13 Refused If one of the subjects is randomly selected. what is the probability that a randomly selected person is between 22 and 20 years or refused to answer? The probebility that s randomly selected person is between 22 and 29 years or refused to answer is 35 (Do not round until the final answer. Then round to three decimal places as needed.) If one of the subjects is randomly selected, what is the probability that the selected person was between 18 and 21 years or refused to answer? The probability that the selected person was bethween 18 and 21 years or refused to answer is 215 (Do not round unti the final answer. Then round to three deaimal places as needed.) Enter your answer in the edit tields and then click Check Answer All parts showing Clear All Check Answer

Explanation / Answer

Total number of person involved in survey is sum of all the values here.

Pr(between 22 to 29 years or refused to answer) = (Number of people between 22 to 29 years + Number of people who refused to answer - people who are between 22 to 29 years and refused to answer) / Total surveyed people

= (274 + 194 - 22)/ 1225 = 0.364

Q.2 Pr(between 18 to 21 years or refused to answer) = (Number of people between 18 to 21 years + Number of people who refused to answer - people who are between 18 to 21 years and refused to answer) / Total surveyed people

= (83 + 194 - 13)/ 1225 = 0.216

18-21 22-29 30-39 40-49 50-59 60+ Total Respond 70 252 242 133 135 199 1031 Refused 13 22 35 28 37 59 194 Total 83 274 277 161 172 258 1225

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