Question

question 12
researchers are interested in whether cutting out desserts at night will help with insomnia. in addition, they wonder if exercise will have an impact. they decide to conduct an experiment on volunteers who suffered from insomnia. the subjects were either given desserts or not given dessert, and also either put on an exercise program or told not to exercise.
how many factors does this experiment have?
if every possible combination of the variable values was used, how many treatments were there?

Explanation:

Step1: Identify the factors

The factors are dessert - given or not given, and exercise - do exercise program or not.

Step2: Calculate the number of treatment combinations

The number of levels for the dessert factor is 2 (given or not given), and the number of levels for the exercise factor is 2 (do exercise or not). The total number of treatment combinations is found by multiplying the number of levels of each factor. So, the number of treatment combinations is $2\times2 = 4$.

Answer:

4