Selena just completed the performance appraisals of three new statisticians. On the company's $4-$point grading scale, the average score for the three statisticians was $3\mathrm{.}0.$ The average of all statisticians in the organization was $3\mathrm{.}5.$ Which concept was $14\%$ below average?

new hire performance

time required to hire

cost per hire

new hire turnover

yield ratio