A Company That Receives Most of Its Orders by Telephone

question 6

Multiple Choice

A company that receives most of its orders by telephone conducted a study to determine how long customers were willing to wait on hold before ordering a product.The length of waiting time was found to be a variable best approximated by an exponential distribution with a mean length of waiting time equal to 2.8 minutes (i.e.the mean number of calls answered in a minute is 1/2.8) .What proportion of callers is put on hold longer than 2.8 minutes?

• A)0.3679
• B)0.50
• C)0.60810
• D)0.6321

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Definitions:

Uterine Tube

A pair of tubes leading from the ovaries to the uterus, important for the movement of eggs and site of fertilization.

Endometrium

The innermost lining layer of the uterus which thickens during the menstrual cycle to prepare for potential pregnancy.

Cellular Hypertrophy

An increase in cell size, often associated with increased organ size and function, typically as a result of exercise or health conditions.

LH

Luteinizing hormone, a hormone produced by the anterior pituitary gland that triggers ovulation and stimulates the production of sex hormones.