Suppose that 29% of undergraduates at a large university are involved in a campus organization. The administration plans to take an SRS of 100 undergraduates from the population of over 20,000 undergraduate
students at the school to see what proportion of students sampled are involved in a campus organization.
What are the mean and standard deviation of the sampling distribution of the proportion of undergraduate
students who are involved in a campus organization?

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