Question

A wheel-bearing manufacture owns two plants, both in Illinois. She wishes to see if money for health costs can be reduced if a wellness program is instituted. One plant (E) is selected for a yearlong experimental program that includes health screening and individually tailored fitness activities. The second plant ( C ) is the non-equivalent control group. Absence due to sickness rates, operationally defined as the number of sick days per year per 100 employees, are measured at the beginning and at the end of the experimental year. What follows are four sets of results. Construct a graph for each and decide which (if any) provide evidence of program effectiveness. For those outcomes not supporting the program effectiveness, provide an alternative explanation for the experimental group’s apparent improvement.

Outcome 1 E= pretest= 125 posttest=100 C= pretest= 125 posttest=125

Outcome 2 E= pretest= 125 posttest=100 C= pretest= 100 posttest=100

Outcome 3 E= pretest= 125 posttest=100 C= pretest= 130 posttest=105

Outcome 4 E= pretest= 125 posttest=100 C= pretest= 110 posttest=110

Answer 1

As you see in the graph, In all 3(i, ii, iv) outcomes there is significant reduction in the Absence due to sickness rates in the experimental group (E) compared to non-experimental group (C) which provide evidence of program effectiveness.

Were as in outcome 3 there is a similar reduction in Absence due to sickness rates in non-equivalent control group (C) where the wellness program was not instituted. This may be due to some history effects like some Other things might have happened between the pretest and the post test.