Suppose weights, in pounds, of dogs in a city are normally distributed and have a known population standard deviation of pounds and an unknown population mean. A random sample of 17 dogs is taken and gives a sample mean of 30 pounds. Find the confidence interval for the population mean with a 80% confidence level. Z0.10 Zo.05 Z0.025 Z0.01 Z0.005 1.282 1.645 1.960 2.326 2.576 Use the common z values given above. Round the final answer to two decimal places.