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Safari File Edit View History Bookmarks Window Help 48% E- Sun 11:02 PM mathal.com MATH 227: Statistics (Mon/Wed. 7:00 to 9:05 p.m) BRENDA ACUNA 10/22/17 1 Test: Test #2 (Due Monday, October 23, at 7:00 p.m.) 6 of 10 This Test: 100 pts This Question: 10 pts Question Hel A university conducted a survey of 277 Sophomore, Junior, and Senior undergraduate students regardng satisfaction with student govemment. Results Complete parts a and b below of the survey are shown in the table by class rank Junior 63 15 13 91 Sophomore 53 178 41 58 277 62 Not satisfied Total 20 90 96 a if one survey parscipant is randomly selected, what isthe probability that he or she is a Senior? The probability that one randomly selocted survey participant is a Senior is Round to three decimal places as needed.) b. If one survey participant is randomly selected, what is the probablity that he or she is satisfied? The probability that one randomly selected survey particpant is satisfied is Round to three decimal places as needed.) Enter your answer in each of the answer boxes. Save for Later

Explanation / Answer

Given that

a) Total participants = 277

Total number of seniours = 96

Therefore the probability that one randomly selected survey participant is a seniour is given by

= ( Total number of seniours/Total number of seniours) = 96/277=0.347

b) Total number of satisfied participants = 178

Therefore the probability that one randomly selected survey participant is satisfied is given by

= (Total number of satisfied participants/Total participants) = 178/277=0.643

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