A water company wanted to estimate its customers pay per month. A random sample of 25 customers produced a sample mean of $30 and a sample standard deviation of $5. Find a 90% confidence interval for the population mean in this situation.

Time Left:0:25:47 Rafaelito De Jesus: Attempt 1 Question 20 (Mandatory) (5 points) Saved 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. ( Hint. In the previous question. $5 is the standard deviation of the whole population, while now $5 is a standard deviation of just a sample of 25 customers.) c) Find a 90% confidence interval for the population mean in this situation (that is, the situation of the previous question). 28.29