STA 2023 Study Guide - Final Guide: Normal Distribution, Central Limit Theorem, Confidence Interval
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68%, 95%, 99. 7: waiting to be seated. The average waiting time to be seated for dinner at a population restaurant is 23. 5 minutes, with a standard deviation of 3. 6 minutes. When a patron arrives at the restaurant for dinner, find the probability that the patron will have to wait the following time: between 15 and 22 minutes. 009 not likely: an automobile dealer finds that the average price of a previously owned vehicle is . He decides to sell cars that will appeal to the middle 60% of the market in terms of price. Find the maximum and minimum prices of the cars the dealer will sell. The standard deviation is , and the variable is normally distributed. Z=x bar-mean/standard error: the mean serum cholesterol level of a large population of overweight children is 220 milligrams per deciliter (mg/dl), and the standard deviation is 16. 3 mg/dl.
