Shipping errors at El Dorado International have become a source of unquestioned severity. Management is considering a training program for employees who are guilty of such incompetence. However, the cost of the program is a concern. A total of 75 employees are subjected to the training and a record is kept of their subsequent errors. Data are collected on the number of hours of training and the number of errors each employee reports. Using hours of training as a regressor, the resultant model is

a. Interpret the results and analyze the effect of the training on shipping.

b. Set α at 4% and test the hypothesis for the significance of the regression coefficient.

c. Compute and interpret the 99% confidence interval for the regression coefficient.

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SSX= SSy= SSX= 417 1000 -147 X = Y = 2.6 1.3 b = b= S.= -0.3525 2.2165 3.604