Mathematics, 09.01.2020 04:31 andrewjarrah05
Astudy attempts to compare two sunscreens. each of 50 subjects with varying skin complexions will use both sunscreens—screen a on one side of his or her body and screen b on the other side. for each subject, a coin is tossed in order to determine which side receives screen a and which receives screen b. researchers measure the amount of ultraviolet light exposure over both treated areas for each subject. this is an example of:
a. the placebo effect. b. a stratified analysis. c. a double-blind observational study. d. a matched pairs experiment.
Answers: 1
Mathematics, 21.06.2019 17:00, ChooseHappy
One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.
Answers: 2
Mathematics, 21.06.2019 20:00, jortizven0001
Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !
Answers: 1
Astudy attempts to compare two sunscreens. each of 50 subjects with varying skin complexions will us...