A study recruited 48 overweight adults aged 55 to 75 years, and randomly divided them into two groups. Participants in one group drank 2 cups of water prior to their meals; the other group did not. All participants ate a low-calorie diet during the study. Over the course of 12 weeks, water drinkers lost about 15.5 pounds, while the non-water drinkers lost about 11 pounds, on average.
What is the response variable in this study?

Question

Quizplus · Accepted Answer

The response variable in this study is the weight lost (in pounds) by both groups over the course of 12 weeks. This is the main outcome being measured and compared between the two groups. The other factors mentioned, such as the number of cups of water drunk before meals, age, and being overweight, are all potential explanatory variables or characteristics of the study participants.

A Study Recruited 48 Overweight Adults Aged 55 to 75