Question 7

Scenario:

The endorphins released by the brain act as natural painkillers. Some researchers wanted to monitor pain thresholds in pregnant rats the days before they gave birth to see if there was a change in pain threshold leading up to giving birth. They measured this pain threshold at 7, 5, 3 and 1 days prior to giving birth.

What type of hypothesis test should be used for this scenario?

1. One-way repeated-measures ANOVA
2. Independent measures t-test
3. Factorial ANOVA
4. One-way independent-measures ANOVA
5. Paired-samples t-test

Which assumptions should be met for the hypothesis test results to be trusted in this scenario?

1. Sphericity
2. Homogeneity of variance
3. Independence
4. Normality