TABLE 13-10
the Management of a Chain Electronic

question 164

Essay

TABLE 13-10
The management of a chain electronic store would like to develop a model for predicting the weekly sales (in thousand of dollars) for individual stores based on the number of customers who made purchases. A random sample of 12 stores yields the following results:
$$\begin{array} { | l | l | } \hline \text { Customers } & \text { Sales (Thousands of Dollars) } \\\hline 907 & 11.20 \\\hline 926 & 11.05 \\\hline 713 & 8.21 \\\hline 741 & 9.21 \\\hline 780 & 9.42 \\\hline 898 & 10.08 \\\hline 510 & 6.73 \\\hline 529 & 7.02 \\\hline 460 & 6.12 \\\hline 872 & 9.52 \\\hline 650 & 7.53 \\\hline 603 & 7.25 \\\hline\end{array}$$
-Referring to Table 13-10, construct a 95% confidence interval for the change in average weekly sales when the number of customers who make purchases increases by one.

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Definitions:

Car Salespeople

Individuals engaged in selling automobiles, often working at car dealerships or showrooms.

Joint Probability Distribution

The probability distribution of two or more random variables at the same time, used to study the relationship between them.

Probability Distribution

Describes how the probabilities are distributed over the values of a random variable, showing the likelihood of different outcomes.

Car Salespeople

Professionals engaged in selling automobiles, often working at car dealerships to assist customers in finding and purchasing new or used vehicles.