/21/12 Math10 Summer 2012: Quiz 2
Math10 Statistics Summer 2012 Martinez or Mudge You are logged in as Jessica Panchal (Logout) Home ? Math10 Summer 2012 ? Quizzes ? Quiz 2 ? Attempt 1
Marks: 5 sex of the student. A survey was taken of 470 college students in California that relates their sex to the frequency of exercise per week. The results are summarized in the contingency table below. Use this data to answer problems 1, 2 and 3.
It is thought by some researchers that exercise for college students is related to the
I no exercise per week once or twice per week more than twice per week Totals Male 88 76 58 222 Female 72 85 91 248 Totals 160 161 149 470
What proportion of the students surveyed exercise at least once per week?
Choose one answer.
160 470 248 470 310 C. 470 D. 321 470 E. None of the above
2 Use the above contingency table to answer this question. If one of the 470 college Marks: 5 students is selected at random, what is the probability that the student is a female who exercises at least once per week? Round your answer to four decimal places.
Choose one A. 0.1936 answer. B. 0.5277
C. 0.1532 D. 0.3745 E. None of the above vin.beoga.net/mod/quiz/attempt.php?id=12926 1/