TABLE 13-4
the Managers of a Brokerage Firm Are Interested

question 145

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.
$\begin{array}{lll}\text { Broker } & \text { Clients } & \text { Sales } \\1 & 27 & 52 \\2 & 11 & 37 \\3 & 42 & 64 \\4 & 33 & 55 \\5 & 15 & 29 \\6 & 15 & 34 \\7 & 25 & 58 \\8 & 36 & 59 \\9 & 28 & 44 \\10 & 30 & 48 \\11 & 17 & 31 \\12 & 22 & 38\end{array}$

-Referring to Table 13-4, the managers of the brokerage firm wanted to test the hypothesis that the number of new clients brought in had a positive impact on the amount of sales generated. At a level of significance of 0.01, the null hypothesis should be________ (accepted or rejected).

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Definitions:

Buffer

A solution that resists changes in pH when acid or alkali is added to it, maintaining a relatively stable pH.

Polysaccharide

A complex carbohydrate composed of long chains of monosaccharide units bound together, serving as energy stores or structural components in living organisms.

High Heat Capacity

The property of a substance that allows it to absorb a considerable amount of heat without undergoing a significant change in temperature.

Carbonic Acid

A weak acid formed in solution when carbon dioxide dissolves in water.