Find the Coefficient of Variation for Each of the Two $$\begin{array} { l l l l l l l l } \text { Live agent: } & 6.3 & 2.5 & 4.8 & 4.1 & 3.4 & 5.2 & 3.7\end{array}$$

question 127

Multiple Choice

Find the coefficient of variation for each of the two sets of data, then compare the variation. Round results to one
decimal place.
-The customer service department of a phone company is experimenting with two different systems. On Monday they try the first system which is based on an automated menu system. On Tuesday they try the
Second system in which each caller is immediately connected with a live agent. A quality control manager
Selects a sample of seven calls each day. He records the time for each customer to have his or her question
Answered. The times (in minutes) are listed below. $$\begin{array} { l l l l l l l l } \text { Live agent: } & 6.3 & 2.5 & 4.8 & 4.1 & 3.4 & 5.2 & 3.7\end{array}$$

• A)Automated Menu: 43.7% Live agent: 29.4%
• There is substantially more variation in the times for the automated menu system.
• B)Automated Menu: 45.3% Live agent: 30.5%
• There is substantially more variation in the times for the automated menu system.
• C)Automated Menu: 46.9% Live agent: 31.5%
• There is substantially more variation in the times for the automated menu system.
• D)Automated Menu: 24.3% Live agent: 46.2%
• There is substantially more variation in the times for the live agent.

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Definitions:

Coupon Payment

The interest payment made to bondholders, typically semiannually, as a return on investment.

Coupon Bond

A bond that makes regular interest payments to its holders, named after the detachable coupons once used for interest payments.

Real Risk Free Rate

The rate of return on an investment with no risk of financial loss, after adjusting for inflation.

Inflation Premium

The additional interest rate that lenders charge borrowers to compensate for the loss of purchasing power due to inflation.