TABLE 8-7
After an extensive advertising campaign, the manager of a company wants to estimate the proportion of potential customers that recognize a new product. She samples 120 potential consumers and finds that 54 recognize this product. She uses this sample information to obtain a 95% confidence interval that goes from 0.36 to 0.54.
-Referring to Table 8-7, 95% of the time, the proportion of people that recognize the product will fall between 0.36 and 0.54.

Question

Quizplus · Accepted Answer

A 95% confidence interval means that if we were to take many samples and build a confidence interval from each of them, we expect 95% of those intervals to contain the true proportion. It does not mean that 95% of the time the proportion will fall within this specific interval.

TABLE 8-7 After an Extensive Advertising Campaign, the Manager of a Company