Molly's teacher asked her to morsure the length of the rectangle shown above her ruler to the nearest inch The ruler Molly used was the only inch ruler she had . When she measured the length of the rectangis , told her teacher that it was 8 long. teacher was unsure of how Molly came up with the answer because the ruler doesn't show eighth of an Molly carroet ? Explain why or why nat

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