Which type of data would be BEST displayed in a
dot plot?
the number of toothbrushes distributed
each month for the last 24 months
(range: 725-2450)
the number of miles the dental clinic bus
travelled each month for the last 60
months (range: 700-875)
the number of students seen in a school
clinic that did not have any cavities
the number of dentists volunteering their
time in each of the last 15 school dental
clinics (range: 3-28)

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