Online courses: A sample of 209 students who were taking online courses were asked to describe their overall impression of online learning on a scale of 1-7, with 7 representing the most favorable impression. The average score was ).77, and the standard deviation was 0.98. Part: 0 / 2 Part 1 of 2 (a) Construct a 90% confidence interval for the mean score. Round the answers to two decimal places. A 90% confidence interval for the mean score is