Mitchell is a big coffee fan, so he always takes care of coffee brewing at the office. normally he uses 100 grams of robust coffee to prepare 10 cups of coffee. his friend brings him a packet of arabica coffee and tells him that he should use 20% more than usual when brewing arabica coffee. how many grams of coffee should he use to make a 15 cup pot of arabica coffee?

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