X 0 10 10 20 20 30 30 40 40 50 50 60 – – – – – – f 4 12 5 11 8 7 Level III – The mean of 5 observations is 4.4 and their variance is 8.24. If three of the observations are 1, 2 and 6. Find the other two observations. The means and standard deviation of marks obtained by 50 students of a class in three subjects, Mathematics, Physics and chemistry are given below: Subject -> Mathematics Physics Chemistry Mean 42 32 40.9 Standard Deviation 12 15 20 Which of the three subjects shows the highest variability in marks. Find the standard deviation and variance of the following data: X 0 10 10 20 20 30 30 40 40 50 50 60 – – – – – – f 8 5 6 4 9 10 Find the mean, variance and standard deviation using short-cut method: Height in cms No. of 3 4 7 7 15 9 6 6 3 Children Module 12 Probability
X 0 – 10 10 – 20 20 – 30 30 – 40 40 – 50 50 – 60 f 4 12 5 11 8 7 Level – III The mean of 5 observations is 4.4 and their variance is 8.24. If three of the observations are 1, 2 and 6. Find the other two observations. The means and standard deviation of marks obtained by 50 students of a class in three subjects, Mathematics, Physics and chemistry are given below: Subject -> Mathematics Physics Chemistry Mean 42 32 40.9 Standard Deviation 12 15 20 Which of the three subjects shows the highest variability in marks. Find the standard deviation and variance of the following data: X 0 – 10 10 – 20 20 – 30 30 – 40 40 – 50 50 – 60 f 8 5 6 4 9 10 Find the mean, variance and standard deviation using short-cut method: Height in cms No. of Children 3 4 7 7 15 9 6 6 3 Module 12 Probability
662242412class_xi_mlls_maths.docx