X Login with Google - Zoor X class 2-6 7-11 12-16 17-21 ) The Range: = b b) 3.8 a) 19 b) 20 c) 27 d) 28 - The Range after adding 3 marks for each student becomes= d a) 19 b) 20 c) 27 d) 28 2, the Range after multiplying each mark by the number (-2) becomes= c a) 20 b) - 20 c) - 40 d) 40 4) The Meande a) 8 b) 9.5 c) 10.5 d) 12 5) The Mean after adding 2 marks for each student becomes = b a) 10.5 b) 11.5 c) 12.5 d) 14 6) The mean deviation = a a) 3.4 c) 4.2 7) 2 ((x - x). 5 ) - 10 i=1 a) 300 b) 310 8) The variance = a a) 21.32 9) The standard deviation = b a) 4.62 b) 5.02 b) 25.26 frequency 4 d) 5.2 c) 26.57 c) 4.64 c) 405 d) 410 8 6 2 Assignment 410 NO d) 32.7 d) 5.72