A random sample of n-5 is drawn with a sample mean x-12 from a normally distributed population with # = 1 . Find the 99% confidence interval for the mean 2. Find the 95%% confidence interval for the mean * = 0.1 x = 19 n-31 3. 50 people are selected to take the Comprehensive Assessment of Spoken Language (CASL) test. The average of those n-50 people is x -92 and the population standard deviation is a = 15 . Construct a 95% confidence interval for