For a repeated-measures study, a small variance for the difference scores indicates that the treatment has little or no effect

Marasmus is _____________________

a. a disease common among malnourished women with HIV b. most common during childhood and contracted through breast milk c. an infant disease characterized by muscle atrophy and abnormal drowsiness d. a deadly disease resulting from contaminated water being used to dilute formula

How do randomized controlled trials (RCTs) differ from other pretest-posttest designs?

a) The focus is on intervention. b) The researchers use random selection. c) The experiment is in a lab. d) The participants are representative.