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Stat-101, Quiz 2 Majmaa’ah University Engineering College Stat 101 25/5/1432 Name: Level 1 Academic Number: Quiz (2) 1- The following data, gives the frequency distribution of the daily commuting times (in minutes) from home to college for all 20 students of level 5 at College of Engineering, Majmaah University. Daily Commuting Time (minutes) Number of Students 0 to less than 10 10 to less than 20 20 to less than 30 30 to less than 40 40 to less than 50 3 8 5 3 1 Calculate the Variance and Standard Deviation. 1 SaMeH Stat-101, Quiz 2 2- The ages of 12 randomly selected students from a class are: 26, 21, 19, 27, 22, 20, 29, 19, 25, 21, 22, and 30. Find the mode 3- Select the correct answer that describes the following figure: a) A histogram and frequency curve Skewed to the left b) A histogram and frequency curve Skewed to the Right c) A Symmetric histogram and frequency curve 4- The following are the ages of nine employees of a company: 47 28 39 51 33 37 24 33 59 a) Find the values of the three quartiles. Where does the age of 38 falls in relation to the ages of these employees? b) Find the interquartile range? 2 SaMeH