I have calculated the Z score as it represent the probability by considering X=70
Z= 70-39/7= 4.42
Now, in order to calculate variance for personal transportation I have done 1-Zscore= 1-4.42=3.42.
So we should deduct 3.42 in order to increase their chances to come on time using personal transportation.
Am i correct?
@KatieBarry this is not a home work question. I am not asking for a complete solution but a general approach. May be my understanding of concept is weak but that not make my effort less. I have tried several approach which includes following :
I have tried by calculating the z score for the people using personal transport by assuming n= 70.
According to a manager it takes an average weekday commute of 39 minutes with a Standard Deviation of 7 minutes for the employees to get to work when they use their personal vehicles for their office commute while management set a policy of not more than 40 minutes for their daily one-way commute. A survey conducted one day on 70 employees showed…[Read more]
I tried but got confused with the defectives. Following is the steps which I have done:
For servivce A:
For Service B:
For overall process: 1333.33+3400=4733.33
Please suggest am I doing it right.
PS: This a practice test question and I got stuck because it answer is
Consider a company that provides two services using the same basic process. Service A is relatively complex, and can be defective in 15 different ways. Service B is relatively simple, with only 5 possible defects. The company produces 500 units of A and 1000 units of B. A total of 10 defects are experienced in product A and 17 defects are…[Read more]