The HR manager is looking into providing training for some of the staff. The estimated benefit is $2,000, while the cost is $1,500. What is the Return on Investment (ROI) from the training? Select one: a. 0.333% b. $2,000 c. 33.3% d. $500

Based on the Residual plot below, what would you conclude?

Select one:

a. The variance of the residual is not constant.

b. The residuals are randomly scattered so that no model modification is needed.

c. The residual suggests that the model is not linear.

d. The residual suggests that the data is not independent.