What is the estimated average time per phone call

Assignment Help Operation Management

Reference no: EM131730026

Work Sampling

A work sampling study is to be performed on an office pool consisting of 10 persons to see how much time they spend on the telephone. The duration of the study is to be 22 days, seven hours per day. All calls are local. Using the phone is only one of the activities that members of the pool accomplish. The supervisor estimates that 25% of the time of the workers is spent on the phone.

Provide the following:

(a) At the 95% confidence level, how many observations are required if the lower and upper limits on the confidence interval are 0.20 and 0.30.

(b) Regardless of your answer to (a), suppose that 200 observations were taken on each of the ten workers (2000 observations total), and members of the office pool were using the telephone in 590 of these observations. Construct a 95% confidence interval for the true proportion of time on the telephone.

(c) Phone records indicate that 3894 phone calls (incoming and outgoing) were made during the observation period. What is the estimated average time per phone call?

Reference no: EM131730026

Questions Cloud

What ethical conflicts does the president face : What rationalizations can you detect that plant employees have devised, What ethical conflicts does the president face

Readiness for change impacts resistance for change : How exactly does readiness for change impacts resistance for change and the likely success of change initiatives?

Explain how choice will affect power of any hypothesis tests : A researcher is deciding whether to use a sample size of 100 or whether to increase the sample size to 200. Explain how this choice will affect the power.

What is the direct materials usage variance : Garland Company uses a standard cost system. What is the direct materials usage variance for the month of December

What is the estimated average time per phone call : What is the estimated average time per phone call?

Describe what the personnel involved did right : This guideline is invaluable in my eyes because we need to be able to identify the hazard or incident so we know how and who will respond.

What action plan would you recommend to robin? : What are the pros and cons of accepting offer of barons to assist in securing King Richard's release from prison? What action plan would you recommend to Robin?

What was the direct labor efficiency variance : NewTone, Inc makes MP3 players and uses standard costing. The company's actual payroll cost amounted to $300,000. What was the direct labor efficiency variance

Explain how a bull spread can be created from the two option : Explain how a bull spread can be created from the two options and using a payoff table show the profit pattern for the various stock price range

User Account

All Pages