11:32 Classwork 8.1 and... Q Math 159 Classwork for 8.1 and 8.2 Name: 1) Suppose we have data from a sample of size n = 36. The sample mean x is 68, the population standard deviation o is 3. Find the confidence interval estimate for population mean at 95% confidence level. a) Identify key information: CL, n x, o. b) Find critical value Za/2 at confidence interval at 95%. Use inverse Normal calculator, round to 2 dec. places. za/2 = c) Find Error Bound for mean (E) = Za/2 Vn = d) Write confidence interval for mean u in inequality notation and + notation.