Question

any firms use on-the-job training to teach their employees computer programming. Supposeyou work in the personnel department of a firm that just finished training a group of its employeesto program, and you have been requested to review the performance of one of the trainees on thefinal test that was given to all trainees. The mean and standard deviation of the test scores are 70and 3, respectively, and the distribution of scores is mound-shaped and symmetric. Suppose thetrainee in question received a score of 60. Compute the trainee's z-score.

Answer 1

-3.33

Explanation:

The formula for calculating a z-score is is z = (x-μ)/σ,

where x is the raw score

μ is the population mean

σ is the population standard deviation.

x = 60, μ = 70, σ = 3

z = 60 - 70/3

z = -10/3

z = - 3.3333333333

Approximately, the students z score = -3.33