2. Students were also asked to self-report their GPA. Most schools consider a GPA of

2. Students were also asked to self-report their GPA. Most schools consider a GPA of < 2.0 to be academic probation. Out of 237 valid responses, 20 students self-reported a GPA that would qualify as academic probation. What is the estimated proportion of students on academic probation at University X? What is the 95% Cl of this estimate? 3. Can medical clowning improve the success of in vitro fertilization? To find out, 186 women seeking in vitro fertilization were randomly assigned to either medical clowning or no medical clowning. Of the 93 women given medical clowning, 33 became pregnant (p = 33/93 = 35.4%). Of the 93 not given medical clowning, 18 became pregnant (p = 18/93 = 19.4%). What is the difference in pregnancy rates for medical clowning vs. no medical clowning? What is the 95% Cl for this difference? Interpret the result: Does medical clowning significantly facilitate pregnancy?