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Question 20 (5 points) A water supplying company wished to estimate the average amount the private customers pay per month. A random sample of 25

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Question 20 (5 points) A water supplying company wished to estimate the average amount the private customers pay per month. A random sample of 25 customers' bills produced a sample mean of $30 and a sample standard deviation of $5. c) Find a 90% confidence interval for the population mean. O 32.29 SM

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