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

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Jayla Lawrence · Accepted Answer

Final Answer : C, Explanation :  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.

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