The number of ads on a corner in the city are normally distributed with a population standard deviation of 7 ads and an unknown population mean. If a random sample of 20 corners is taken and results in a sample mean of 21 ads, use Excel to find a 95% confidence interval for the population mean.

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01-06-2024
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The number of ads on a corner in the city are normally distributed with a population standard deviation of 7 ads and an unknown population mean. If a random sample of 20 corners is taken and results in a sample mean of 21 ads, use Excel to find a 95% confidence interval for the population mean.

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