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.What type of study is this?
A)An observational study that is a sample survey
B)An observational study that is not a sample survey
C)An experiment but not a double-blind experiment
D)A double-blind experiment
E)A matched pairs experiment

Question

Quizplus · Accepted Answer

This is an experiment because the researchers assigned participants to two different groups, one with a low sugar diet and the other with 10% calories from sugar. They then measure the effect of the treatment, which is the sugar intake, by comparing weight gain between the two groups. However, it is not a double-blind experiment because the researchers knew which participants were in which group and could potentially influence the outcomes.

A Researcher Is Studying the Relationship Between Sugar Consumption and Weight