Asked by jenna
Suppose that you have developed three new kinds
of hair shampoo, and you want to know how people's preference depends on their
age. Design an experiment to find out.
of hair shampoo, and you want to know how people's preference depends on their
age. Design an experiment to find out.
Answers
Answered by
Dr. Jane
You might have people randomly assigned to the three shampoos and block by age.
Shampoo A B C
age group 1
age group 2
age group 3
Give each age group shampoos A, B, C. have them use each shampoo for a week and then rate them.
Shampoo A B C
age group 1
age group 2
age group 3
Give each age group shampoos A, B, C. have them use each shampoo for a week and then rate them.
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