Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the same number of decimal places as the sample mean. A group of 66 randomly selected students have a mean score of 22.4 with a standard deviation of 2.8 on a placement test. What is the 90% confidence interval for the mean score, μ, of all students taking the test?

21.6 < μ < 23.2

21.7 < μ < 23.1

21.5 < μ < 23.3

21.8 < μ < 23.0