# Mean, Standard Deviation, Count, Confidence Intervals

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Assume that the random variable is normally distributed

A parking control officer is conducting an analysis of the amount of time left on parking meters. A quick survey of 15 cars that have left their metered parking spaces produced the following times (in minutes). Estimate with 95% confidence the mean amount of time left for all the city's meters.

22 15 1 14 0 9 17 31

18 26 23 15 33 28 20

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