An Experiment Was Done to Look at Whether Different Relaxation

Multiple Choice

An experiment was done to look at whether different relaxation techniques could predict sleep quality better than nothing. A sample of 400 participants were randomly allocated to one of four groups: massage, hot bath, reading or nothing. For one month each participant received the same relaxation technique for 30 minutes before going to bed each night. A special device was attached to the participant's wrist that recorded their quality of sleep, providing them with a score out of 100. The outcome was the average quality of sleep score over the course of the month.
- Which test could we use to analyse these data?

A) Regression or ANOVA
B) Regression only
C) ANOVA only
D) Chi-square