lutiornpuse/0sers.ntml?operatior Getting Started Lt. Student Portal Career Cente

Question

lutiornpuse/0sers.ntml?operatior Getting Started Lt. Student Portal Career Center Referring to Scenario A, of those who did not study before the midterm in the sample, the midterm. percent of them did well on Scenario A A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went out and did not study the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result. Studying for Exam Did not Study Did Well in Midterm Midterm 80 30 20 70 a Minimized View 15

Explanation / Answer

P(did well in the midterm | did not study ) = P(di not study for exam and did well in the midterm) / P(did not study)

= (30/200) / ((30+70)/200)

= 30 / 100

= 30%

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