Question

Fifty people with sore legs are randomly divided into two groups. OneFifty people with sore legs are randomly divided into two groups. One group is treated weekly with energetic music and an exercise regimen. The other is

treated with weekly with exactly the same exercise regimen comma but not exactly the same exercise regimen, but no

energetic music.After one​ year, both groups are questioned about their sore legs.questioned about their sore legs.

a. Identify the response variable and the explanatory variable.

b. Was this an observational study or an​ experiment? Explain why

Answer 1

(A) Response variable is sore legs because we are checking the condition of sore legs by applying some conditions. Explanatory variables are energetic music and exercise regimen because these two are responsible for showing changes in the soreness of legs

(B) it is not an observational study because in this case, researcher has applied modification or personalized condition.

Researcher had provided people with energetic music and exercise regimen, so the outcome is affected due to researcher presence.

so, it is an experiment.