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. 
-Referring to Table 13-4, suppose the managers of the brokerage firm want to construct both a 99% confidence interval estimate and a 99% prediction interval for X = 24. The confidence interval estimate would be the ________ (wider or narrower) of the two intervals.
Definitions:
Heart Disease
A range of conditions affecting the heart, including coronary artery disease, heart attacks, and heart failure.
Cigarette Smoking
The act of inhaling and exhaling the smoke from burning tobacco encased in cigarettes, a habit associated with health risks.
Alzheimer's Disease
A degenerative brain disease characterized by memory loss, cognitive decline, and personality changes, often associated with aging.
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