You are trying to find out which position best relieves back pain during labor: right side lying, left side lying,or back lying with 45 degree HOB elevation. Pain in this study is measured by a HR increase of 10 beats per minute over baseline during each contraction; one overall mean was collected for each patient. Data were collected over a 3 month period on 50 women, all having natural childbirth - all first pregnancy. Which statistical test would you use to determine the most pain relieving position during labor?

A. Chi Square

B. One-way ANOVA

C. Paired t-test

D. Pearson Product Moment Correlation test