You sample a normally distributed population Your sample mea

You sample a normally distributed population. Your sample mean is 45, your sample standard deviation is 3 and your sample size is 30. What is the LOWER limit of the confidence interval assuming the critical value you need from the z table is 1.96. Give your answer as XX.X

Solution

LCL = 45 - 1.96*3/sqrt(30) = 43.9