8.9 At a large university, the graduation rate for
student athletes was reported to be 0.61. For
two of the following, we cannot use this
chapter's methods to find the probability in
question; explain why in each case.
a. The probability that fewer than 3 in a
random sample of 6 athletes at the
university graduate.
b. The probability that fewer than 10 in a
random sample of 29 athletes at the
university graduate.
c. The probability that fewer than 10 in a
random sample of 29 football players at
the university graduate.
a

Aresearch study is studying the effects of a new drug for osteoporosis alzheimer's disease (ad) for women above the age of 65 years. a group of individuals with osteoporosis is randomized into two groups. one group is treated conventionally, and the second group is treated with the new medication. assessments are made at 3, 6, 12, 36, and 48 months. the conventionally treated group is assessed for ad using a serum blood test, and the treatment group is assessed for ad using a pet radiotracer that binds to beta-amyloid plaques. in comparing these 2 trial arms, the authors of the study may encounter which type of bias? a. selection bias on the risk of developing b. measurement bias c. confounding bias d. recall bias e. lead-time bias