9th mathematics exercise question with answer, Mathematics

Statistics – Exercise 1.5.3 – Class IX

Find the mean deviation about mean for the following date: a) 14, 21, 28, 21, 18 Solution: Mean = 14+21+28+21+18/5 = 102/5 = 20.4 Score Deviation from mean |D| 14 14 – 10.4 = -6.4 6.4 18 18 – 20.4 = -2.4 2.4 21 21 – 20.4 = 0.6 0.6 21 21 – 20.4 =… Continue reading Statistics – Exercise 1.5.3 – Class IX

9th mathematics exercise question with answer, Mathematics

Statistics Exercise 1.5.3 – Chapter Statistics – Class IX

Find the mean deviation about mean for the following date: a) 14, 21, 28, 21, 18 Solution: Mean = 14+21+28+21+18/5 = 102/5 = 20.4 Score Deviation from mean |D| 14 14 – 10.4 = -6.4 6.4 18 18 – 20.4 = -2.4 2.4 21 21 – 20.4 = 0.6 0.6 21 21 – 20.4 =… Continue reading Statistics Exercise 1.5.3 – Chapter Statistics – Class IX