argaaaant its qm

Sample of Students in a statistics class answered a quiz question and the time it took each student to complete it was recorded. The results are summarized in the following frequency distribution Length of Time (in minutes) Number 5 up to 15 4 15 up to 25 8 25 up to 35 12 35 up to 45 6 What is the standard deviation ? (write your answer with Two decimal places, for example 11.17) > Click Submit to complete this assessment. Question 6 For the following frequency distribution table calculate the mean, where the class limit is 4 class lower limit Class upper limit F 8 4 14 9 23 (Write your answer with Two decimal places, for example 11.17) 4 Click Submit to complete this assessment > Click Submit to complete this assessment. Question 6 For the following frequency distribution table calculate the mean, where the class limit is 4 class lower limit Class upper limit F 8 4 14 9 23 (Write your answer with Two decimal places, for example 11.17) 4 Click Submit to complete this assessment