To examine the calming effect of pets during stressful situations, you recruited 52 children who owned pets and had them perform a stressful task. You randomly assigned the children into three treatment groups and had them perform the task either alone (control group), with a parent, or with their pet present. Their heart rate (in beats per minute) during the task was recorded and you calculated SStreatment= 1987.3 and SStotal=6219.1

a. Do pulse rates differ across the three treatments? Carry out the appropriate test to answer this question and include all steps for full credit.

b. Calculate the appropriate fit statistic for your analysis and interpret it in the context of the problem.