A drugstore manager needs to purchase adequate supplies of various brands of toothpaste to meet the ongoing demands of its customers. In particular, the company is interested in estimating the proportion of its customers who favor the brand of toothpaste, Sensodyn. The Data sheet of the fileP08_15.xlsxcontains the toothpaste brand preferences of 200 randomly selected customers, obtained recently through a customer survey. Calculate a 95% confidence interval for the proportion of all of the company's customers who prefer Sensodyn toothpaste. Round your answers to three decimal places, if necessary.

SensodynLower LimitUpper Limit

How might the manager use this confidence interval for purchasing decisions?

The confidence interval gives the manager an estimate of what theSelect

demand

supply

Item 3

for the product will be. If the interval is tooSelect

wide

narrow

Item 4

, the manager can always sampleSelect

more

less

Item 5

customers.