The Manager of a Computer Help Desk Operation Has Collected

question 6

Multiple Choice

The manager of a computer help desk operation has collected enough data to conclude that the distribution of time per call is normally distributed with a mean equal to 8.21 minutes and a standard deviation of 2.14 minutes. What is the probability that three randomly monitored calls will each be completed in 4 minutes or less?

• A) 0.4756
• B) Approximately 0.1076
• C) About 0.00001
• D) Can't be determined without more information.

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Definitions:

Average Rate of Return

A calculation used to estimate the profitability of an investment, expressed as a percentage of the initial cost of the investment.

Straight-Line Depreciation

A method of allocating the cost of a fixed asset evenly across its useful life, resulting in a consistent depreciation expense each accounting period.

Useful Life

Useful life refers to the estimated timeframe during which an asset is expected to be economically usable by an entity, with reasonable efficiency.

Average Rate of Return

A measure of the profitability of an investment, calculated as the average annual profit returned on an investment, expressed as a percentage of the initial investment cost.