A company tested 11 random brands of vanilla yogurt and found the number of calories per serving given below. (Note that more than 110 different brands of vanilla yogurt exist.) Complete parts a through c. 140 150 150 120 110 100 160 150 120 120 90 . . . .. Yes b) Find a 95% confidence interval for the average calorie content of vanilla yogurt per serving. (Round to two decimal places as needed.)