Question

Chapter 7 - Design of Work Systems: Work Sampling Analysis of a non-repetitive job: Given the following work sampling data, based upon 100 random observations of a particular worker: Activity Times Observed A 20 B 50 C 10 Others 20 1. What is the estimated sample proportion (p-hat) of time this worker spends performing a. Activity A? [.2] b. Activity B? [.5] c. Activity C? [.1] 2. For a confidence level of 95.44% and a maximum error of .04, what should be the sample size for estimating the proportion of time spent performing a. Activity A? [400 observations] b. Activity B? [625 observations] c. Activity C? [225 observations] Ratio-delay study: A total of 300 observations of a carnival ride operator indicated that he was busy working during 249 of the observations. 1. Find the percentage of time that he was working. [83%] 2. For a confidence level of 95% and a maximum allowable error of 3%, how many observations should be taken? [603 observations]

          Chapter 7 - Design of Work Systems: Work Sampling
Analysis of a non-repetitive job:
Given the following work sampling data, based upon 100 random observations of a particular worker:
Activity
Times Observed
A
20
B
50
C
10
Others
20
1. What is the estimated sample proportion (p-hat) of time this worker spends performing
a. Activity A? [.2]
b. Activity B? [.5]
c. Activity C? [.1]
2. For a confidence level of 95.44% and a maximum error of .04, what should be the sample size
for estimating the proportion of time spent performing
a. Activity A? [400 observations]
b. Activity B? [625 observations]
c. Activity C? [225 observations]
Ratio-delay study:
A total of 300 observations of a carnival ride operator indicated that he was busy working during 249 of
the observations.
1. Find the percentage of time that he was working. [83%]
2. For a confidence level of 95% and a maximum allowable error of 3%, how many observations
should be taken? [603 observations]

Chapter 7 - Design of Work Systems: Work Sampling
Analysis of a non-repetitive job:
Given the following work sampling data, based upon 100 random observations of a particular worker:
Activity
Times Observed
A
20
B
50
C
10
Others
20
1. What is the estimated sample proportion (p-hat) of time this worker spends performing
a. Activity A? [.2]
b. Activity B? [.5]
c. Activity C? [.1]
2. For a confidence level of 95.44% and a maximum error of .04, what should be the sample size
for estimating the proportion of time spent performing
a. Activity A? [400 observations]
b. Activity B? [625 observations]
c. Activity C? [225 observations]
Ratio-delay study:
A total of 300 observations of a carnival ride operator indicated that he was busy working during 249 of
the observations.
1. Find the percentage of time that he was working. [83%]
2. For a confidence level of 95% and a maximum allowable error of 3%, how many observations
should be taken? [603 observations]

Added by Michelle G.

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