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

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

The number of cars sold annually by used car salespeople is normally distributed with a standard deviation of 18. A random sample of 380 salespeople was taken and the mean number of cars sold annually was found to be 69. Find the 96% confidence interval estimate of the population mean.

math Statistics-And-Probability

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