Examine a current magazine and take a sample of 30 pages. Record how many of those pages have some form of advertising on them. Based on the results construct a 95 % confidence interval estimate of...

Examine a current magazine and take a sample of 30 pages. Record how many of those pages have some form of advertising on them. Based on the results construct a 95 % confidence interval estimate of the percentage of pages that you would expect to have advertising for the entire magazine.

Q40

In Florida, members of the citrus industry make extensive use of statistical methods. One way includes how growers are paid for oranges used to make orange juice. A sample is taken from each truckload of oranges. This sample is weighed and squeezed, and the amount of sugar in the juice is measured. Based on these sample results, an estimate is made of the total sugar in the truckload. Payment is based on the % of sugar. In a similar vein, how do customs officers decide how many boxes to inspect in a company’s shipments at the docks? How about the security checks at airports? Any concerns?