Mathematics, 31.07.2020 22:01, atefah88
In one study on the effect of tea tree oil on acne, 65 subjects were chosen randomly to use tea tree oil and 65 were chosen to use a placebo. In a second
study, 165 subjects who acknowledged being long-time tea tree oil users had their acne compared with those of 165 people who had never used tea tree
oil. Identify the types of studies performed.
Both studies were controlled experiments.
Both studies were observational studies.
Each study was part controlled experiment and part observational study.
The first study was an observational study whereas the second was a controlled experiment.
The first study was a controlled experiment whereas the second was an observational study.
Answers: 3
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Mathematics, 21.06.2019 14:30, TheCampingStone
The sum of two numbers is 58. the first number is 8 less than half the second number. let c represent the first number. let drepresent the second number. which statements about solving for the two numbers are true? check all that apply. the equation  represents the sum of the two numbers. the equation  represents the sentence “the first number is 8 less than half the second number.”the equation  represents the relationship between the two numbers. the equation  represents the sum of the two numbers. the number d is 14.the number c is 44.the number c is 14.the number d is 44.
Answers: 1
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In one study on the effect of tea tree oil on acne, 65 subjects were chosen randomly to use tea tree...
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