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. Find the coefficient of variation for each of the two sets of data, then compare the variation. Round results to one decimal place. Automated Menu 5.5 7.4 3.9 2.9 9.2 6.3 11.7 Live agent 6.2 2.9 4.4 4.1 3.4 5.2 3.7 Automated Menu:_____% Live agent:_____% (choose the correct one) A)There is substantially more variation in the times for the automated menu system B) There is substantially more variation in the times for the live agent
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
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. Find the coefficient of variation for each of the two sets of data, then compare the variation. Round results to one decimal place.
|
Automated Menu |
5.5 | 7.4 | 3.9 | 2.9 | 9.2 | 6.3 | 11.7 |
| Live agent | 6.2 | 2.9 | 4.4 | 4.1 | 3.4 | 5.2 | 3.7 |
Automated Menu:_____%
Live agent:_____%
(choose the correct one)
A)There is substantially more variation in the times for the automated menu system
B) There is substantially more variation in the times for the live agent
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