Statistics students were asked to go home and fill a 1-cup measure with raisin bran, tap the cup lightly on the counter three times to settle the contents, if necessary add more raisin bran to bring the contents exactly up to the 1-cup line, spread the contents on a large plate, and count the raisins. For the 13 students who chose Kellogg's brand, the reported results were

Construct a 90 percent confidence interval for the mean number of raisins per cup. Show Raisins your work clearly.

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