jashart95
20.09.2020 •
Mathematics
A researcher is studying the relationship between sugar consumption and weight gain. Twelve volunteers were randomly assigned to one of two groups. The first group of five participants was put on a diet low in sugar and the second group of the remaining seven participants received 10% of their calories from sugar. After 8 weeks, weight gain was recorded from each participant. Which of the following basic principles of statistical design was not used in this experiment?
a. Control
b. Randomization
c. Repetition
d. Blinding
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Ответ:
Control
Step-by-step explanation:
In experimental design, control has to do with the process of removing all extraneous variables so that it can be conclusively shown that the independent variable is responsible for the observed response.
In this experiment, there should have been a group that will not receive calories from sugar in their diet at all. This will serve as the control group.
The use of control groups helps to validate an experimental study.
Ответ: