Losing weight is an important goal for many individuals. One group of researchers investigated whether financial incentives would help people lose weight more successfully. Some participants in the study were randomly assigned to a treatment group that offered financial incentives for achieving weight-loss goals, while others were assigned to a control group that did not use financial incentives. All participants were monitored over a four-month period, and the net weight change (Before After, in pounds) was recorded for each individual. Note that a positive value corresponds to weight loss and a negative value indicates weight gain. Weight loss after 4 months (pounds) Control 12.5 12.0 1.0 -5.0 3.0 -5.0 7.5 -2.5 20.0 -1.0 2.0 4.5 -2.0 -17.0 19.0 -2.0 12.0 10.5 5.0 Incentive 25.5 24.0 8.0 15.5 21.0 4.5 30.0 7.5 10.0 18.0 5.0 -0.5 27.0 6.0 25.5 21.0 18.5 [a] Use the concepts in order to answer the question of statistically significance. Show all work from hypotheses to conclusion. Do not forget to copy and paste the pertinent output from StatKey. [b] Estimate the parameter in this problem. Show all work in detail. Do not forget to copy and paste the pertinent output from StatKey