Question 1 Sample of Students in a statistics class answered quiz question and the time it took each student to complete it was recorded. The results are summarized in the following frequency distribution Learth of Time in minutes) Number Sup to 15 1 15 up to 25 25 up to 35 3510 What is the standard deviation with your answer woh Two decades pe11.17 Question 2 For the following frequency distribution table calculate the mean, where the class limit is 4 class lower limit Class upper limit F 12 6 8 18 9 (Write your answer with Two decimal places, for example 11 17) Question 3 What is the mean of the following numbers: 15,95 , 64 , 29, 45, 36,62 (Write your answer with Two decimal places, for example 11.17)