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______ .

---

Definitions:

Atomic Bomb

A weapon of mass destruction that releases energy through nuclear reactions, devastating the target area with explosive force and radiation.

American Public

The collective individuals, or the society, of the United States, often referenced in discussions about public opinion, culture, or national identity.

Truman

The 33rd President of the United States, Harry S. Truman, who served from 1945 to 1953, known for implementing the Marshall Plan to rebuild the economy of Western Europe, and for leading the country during the early stages of the Cold War.

United Nations Security Council

One of the six principal organs of the United Nations, charged with ensuring international peace and security, accepting new members, and approving any changes to its charter.