TABLE 13-4
the Managers of a Brokerage Firm Are

question 33

Short Answer

TABLE 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker. They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars. These data are presented in the table that follows.
$\begin{array}{lll}\text { Broker } & \text { Cliente } & \text { Sales } \\1 & 27 & 52 \\2 & 11 & 37 \\3 & 42 & 64 \\4 & 33 & 55 \\5 & 15 & 29 \\6 & 15 & 34 \\7 & 25 & 58 \\8 & 36 & 59 \\9 & 28 & 44 \\10 & 30 & 48 \\11 & 17 & 31 \\12 & 22 & 38\end{array}$


-Referring to Table 13-4, suppose the managers of the brokerage firm want to obtain a 99% prediction interval for the sales made by a broker who has brought into the firm 18 new clients. The t critical value they would use is ____.

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Definitions:

Pedal

Pertaining to or operated by the foot or feet, such as bicycle pedals or the pedals of a car.

Bicycle

A human-powered, pedal-driven vehicle with two wheels attached to a frame, one behind the other.

Variability

Variability describes the extent to which data points in a dataset differ from each other and from the average, demonstrating the spread or dispersion of the dataset.

Reaction Time

The amount of time taken to respond to a specific stimulus.