1 point Listed below are 15 student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state. Construct a 95% confidence interval for the sample data. What is the upper limit for the confidence interval? Round to 2 decimal places. 3.9, 3.1, 4.0, 4.7, 2.8, 4.1, 3.6, 4.3, 4.2, 4.2, 4.0, 3.6, 3.1, 4.2, 3.9 Type your