TABLE 13-4
the Managers of a Brokerage Firm

question 23

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% confidence interval estimate for the mean sales made by brokers who have brought into the firm 24 new clients. The t critical value they would use is______ .

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Definitions:

Smoking Status

An individual's current use of tobacco products, often categorized as current smoker, former smoker, or never smoker.

Menopause

The natural cessation of menstruation that typically occurs in women in their late 40s to early 50s, marking the end of reproductive years.

Menstrual Pad

A type of feminine hygiene product worn externally to absorb menstrual flow.

Sexual Intercourse

The physical act between individuals that typically involves the penetration of the body, considered a fundamental aspect of human sexuality and reproduction.