NCERT class 11 maths chapter 15 Statistics
Question 1:From the data given below state which group is more variable, A or B? Marks 10-20 20-30 30-40 40-50 50-60 60-70 70-80 Group A 9 17 32 33 40 10 9 Group B 10 20 30 25 43 15 7
Exercise 15.3 maths class 11 Chapter 15 Statistics
Question 2:From the prices of shares X and Y below, find out which is more stable in value: X 35 54 52 53 56 58 52 50 51 49 Y 108 107 105 105 106 107 104 103 104 101
CBSE class 11 maths ncert solutions Chapter 15
Question 3:An analysis of monthly wages paid to workers in two firms A and B, belonging to the same industry, gives the following results: Firm A Firm B No. of wage earners 586 648 Mean of monthly wages Rs 5253 Rs 5253 Variance of the distribution 100 121 of wages (i) Which firm A or B pays larger amount as monthly wages? (ii) Which firm, A or B, shows greater variability in individual wages?
class 11 maths solutions Statistics
Question 4:The following is the record of goals scored by team A in a football session: No. of goals scored 0 1 2 3 4 No. of matches 1 9 7 5 3 For the team B, mean number of goals scored per match was 2 with a standard deviation 1.25 goals. Find which team may be considered more consistent?
Question 5:The sum and sum of squares corresponding to length x (in cm) and weight y (in gm) of 50 plant products are given below: 50 1 212 i i x = å = , 50 2 1 902 8 i i x . = å = , 50 1 261 i i y = å = , 50 2 1 1457 6 i i y . = å = Which is more varying, the length or weight?
