Question: Work Sampling Exercise 1 ( Total = 1 2 ) During a preliminary work sampling study of a particular department, a number of observations were

Work Sampling Exercise

1 (

Total

= 12)

During a preliminary work sampling study of a particular department, a number of

observations were made to establish the approximate values of working, Idle and

Repairs. The work sampling study was carried out on two separate machines. The

blank spaces in the study, is where the observer were unable to make an

observation.

(

Round answers:

1

decimal place

)

1.1

What is the percentage working time for machine

1

and machine

2 ? (2)

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

____________________________________________________________

1.2

What is the percentage time spent on repairs for machine

1

and machine

2 (2)

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

____________________________________________________________

1.3

Based on the above, how many additional observations should be conducted

on machine

1

and machine

2

for a secondary study using a:

95 %

confidence

level and a

6 %

error?

(4)

___________________________________________________________________

___________________________________________________________________1.3.2 99 %

confidence level and a

5 %

error

(4)

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

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