Sample Problem 3 A Work Sampling study is to be performed on an insurance office staff consisting of 14 persons to see how much time they spend processing claims. The duration of the study is 20 days, eight hours per day. Processing claims is only one of the activities done by the staff members. The office manager estimates that the proportion of time processing claims is 0.22. a. At the 95 percent confidence level, how many observations are required if the lower and upper confidence limits are 0.16 and 0.28? (3 pts.) b. Records indicate that 2,210 insurance claims were processed during the observation period. Estimate the average time to process a claim in minutes. (3 pts.) c. Determine a standard for processing claims, but express the standard in terms of the number of claims processed per day (8 hours) per person. Assume a 110% performance rating and only the basic allowance factor is to be included in the standard. (4 pts.) Sample Problem 4 What is the recommended illumination level for a task that requires a difficult assembly? The reflectance of the surface is 25% and for this task speed and accuracy are critical. Most workers performing this task are between 30 to 35 years old. Show each step of the procedure you follow to establish the recommended illumination level. (6 pts.) Sample Problem 5 In a company, an all-day study revealed the following noise sources: 0.25 hrs., 112 dBA; 1.20 hrs., 95 dBA; 2.40 hrs., 92 dBA; 0.75 hr., 104 dBA; 3.40 hr., less than 78 dBA. a. Is this company in compliance? (1 pt.) b. What is the noise dose exposure? (3 pts.) c. What is the time weighted average noise level? (2 pts.) Sample Problem 3 A Work Sampling study is to be performed on an insurance office staff consisting of 14 persons to see how much time they spend processing claims. The duration of the study is 20 days, eight hours per day. Processing claims is only one of the activities done by the staff members. The office manager estimates that the proportion of time processing claims is 0.22. a. At the 95 percent confidence level, how many observations are required if the lower and upper confidence limits are 0.16 and 0.28? (3 pts.) b. Records indicate that 2,210 insurance claims were processed during the observation period. Estimate the average time to process a claim in minutes. (3 pts.) c. Determine a standard for processing claims, but express the standard in terms of the number of claims processed per day (8 hours) per person. Assume a 110% performance rating and only the basic allowance factor is to be included in the standard. (4 pts.) Sample Problem 4 What is the recommended illumination level for a task that requires a difficult assembly? The reflectance of the surface is 25% and for this task speed and accuracy are critical. Most workers performing this task are between 30 to 35 years old. Show each step of the procedure you follow to establish the recommended illumination level. (6 pts.) Sample Problem 5 In a company, an all-day study revealed the following noise sources: 0.25 hrs., 112 dBA; 1.20 hrs., 95 dBA; 2.40 hrs., 92 dBA; 0.75 hr., 104 dBA; 3.40 hr., less than 78 dBA. a. Is this company in compliance? (1 pt.) b. What is the noise dose exposure? (3 pts.) c. What is the time weighted average noise level? (2 pts.)