please solve all parts are needed

1. A work sampling study is to be performed at Mount Sinai Hospital in a physician's office which consists of 4 persons to see how much time they spend with patients, billing, and clerical work. The duration of the study is 20 days, eight hours per day. It was found that 35% of the time is spent with patients, 25% of the time is spent on billing, 20% is spent on clerical tasks and the remaining time is "idle". a. Determine the 95% confidence level for time spent with patients? b. Determine the 95% confidence level for billing? c. Records for the period of the study indicate that 500 patients were seen over that time period. Estimate the average time per patient? d. (10 points) Determine a standard for time with patients." but express the standard in terms of the number of claims processed per day (8 hours) per person. Assume a 125% performance rating and an allowance factor of 15% for pfd e. Records for the period of the study indicate that 550 bills were handled. Estimate the average time per bill processed? f. Determine a standard for handling customer service calls but express the standard in terms of the number of bills processed per day (8 hours) per person. Assume a 125% performance rating and an allowance factor for pfd of 15% is to be included in the standard 1. A work sampling study is to be performed at Mount Sinai Hospital in a physician's office which consists of 4 persons to see how much time they spend with patients, billing, and clerical work. The duration of the study is 20 days, eight hours per day. It was found that 35% of the time is spent with patients, 25% of the time is spent on billing, 20% is spent on clerical tasks and the remaining time is "idle". a. Determine the 95% confidence level for time spent with patients? b. Determine the 95% confidence level for billing? c. Records for the period of the study indicate that 500 patients were seen over that time period. Estimate the average time per patient? d. (10 points) Determine a standard for time with patients." but express the standard in terms of the number of claims processed per day (8 hours) per person. Assume a 125% performance rating and an allowance factor of 15% for pfd e. Records for the period of the study indicate that 550 bills were handled. Estimate the average time per bill processed? f. Determine a standard for handling customer service calls but express the standard in terms of the number of bills processed per day (8 hours) per person. Assume a 125% performance rating and an allowance factor for pfd of 15% is to be included in the standard