10.55Consider an experiment with four groups, with eight values in each. For the ANOVA summary table below, fill in all the missing results:
Source Degrees of Freedom Sum of Squares Mean Square (Variance) F
Among Groups c-1=? SSA=? MSA=80 FSTAT=?
Within Groups n-c=? SSW=560 MSW=?
Total n-1=? SST=?
10.59A hospital conducted a study of the waiting time in its emergency room. The hospital has a main campus and three
Satellite locations. Management had a business objective of reducing waiting time for emergency room cases that did not require immediate attention. To study this, a random sample of 15 emergency room cases that did not require immediate attention at each location were selected on a particular day, and the waiting times (measured from check-in to when the patient was called into the clinic area) were collected and stored inERWaiting.
A.At the 0.05 level of significance, is there evidence of a difference in the mean waiting times in the four locations?
B.If appropriate, determine which locations differ in mean waiting time.
C.At the 0.05 level of significance, is there evidence of a difference in the variation in waiting time among the four locations?