A company would like to assess the impact of using a professional trainer to conduct a confidence-building workshop with its salespeople. A sample of 16 workers is obtained. Half (n = 8) attend the workshop and the other half (n= 8) do not attend the workshop. All workers done assessment to measure confidence. The data for the confidence assessment for each group are presented below.

Does workshop attendance have a significant effect on the confidence levels of the workers? Conduct a hypothesis test using = .05. Include all steps.

Workshop No workshop

n = 8 n = 8

M = 22.8 M = 19.2

SS = 124 SS = 100