Question

Questions: A) We asked 60 Students about their High School Average. B) 63 72 60 59 68 50 65 58 63 76 60 59 68 65 6960 72 55 53 58 67 54 52 63 65 53 68 53 58 67 69 54 55 66 68 55 61 57 71 58 55 61 80 58 62 65 55 78 60 59 82 78 55 53 57 56 58 60 69 57 C) Find: Frequency distribution Table . D) E) The following data represent daily salaries paid to 15 employees working in company 50 55 60 65 80 68 78 75 60 72 65 77 50 65 70 3-The F) Calculate : 1-The Variance (S2 ) Standard deviation(S) G)

Answer 1

Question 2: Daily salaries paid to 15 employees are as follows 50, 55, 60, 65, 80; 68, 78, 75, 60, 72 65, 77, 50, 65, 70 We can treat this as a sample. 2 Sample Variance (5²) = I. 2(x; -7) N7 Here Xo denotes each value of above data. So we need to find X (sample mean). X = Ixi 50+55+60165+...+65+70 N 15 X - 990 .66

Sample Variance = NT E(X-X)" (50 - 66) 7 65-66) 7 (60-60) 7... + (65-66) 760-66) 15-1 1306 14 93.29 Variance (59 = 93.29 Ane >

Sample Standard deviation = x Sample Variance s=N93.29 = 9:66 Are 2 NOTE: population Variance L. 2(x-7) N