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The number of cars sold annually by used car salespeople is normally distributed with a standard deviation

of 19.22. A random sample of salespeople was taken and the number of cars each sold is listed her.
79 43 58 66 101 63 79 33
58 71 60 101 74 55 88
The 95% confidence interval estimate of the population mean is
(1) (58.873; 78.327)
(2) (66.099; 71.111)
(3) (686.000; 255.542)
(4) (68.600; 78.327)
(5) (588.730; 783.270)

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