61 In a routine clinical process observed times in minutes w

6.1 In a routine clinical process, observed times in minutes were 84, 76, 80, 84, and 76. One

observed employee was working 25 percent faster than the average worker. Allowance

factors for this job, based on the workday, add to 20 percent. What are the normal and

the standard times?

Solution

84, 76, 80, 84, and 76.

Mean =80

sd = 3.58

Hence normal time = 80 minutes

Std time is the time within confidence interval

20% means prob for z score =0.80

z = 1.28

Margin of error =