#### Term 2 Statistics Five Marks Questions

9th Standard

Reg.No. :
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Maths

Time : 01:00:00 Hrs
Total Marks : 50
10 x 5 = 50
1. The following table gives the weekly expenditure of 200 families. Find the median of the weekly expenditure.

 Weekly expenditure(Rs) Number of families 0-1000 1000-2000 2000-3000 3000-4000 4000-500 28 46 54 42 30
2. In the class, weight of students is measured for the class records. Caculate mean weight of the students using direct method.

 Weight in kg 15-25 25-35 35-45 45-55 55-65 56-75 No.of students 4 11 19 14 0 2
3. Calculate the mean of the following distribution using Assumed Mean Method

 Class Interval 0-10 10-20 20-30 30-40 40-50 Frequency 5 7 15 28 8
4. Find the Arithmetic Mean of the following data using Step Deviation Method

 Age 15-19 20-24 25-29 30-34 35-39 40-44 No.of persons 4 20 38 24 10 9
5. The following are the scored by the students in the Summative Assessment exam

 Class 0-10 10-20 20-30 30-40 40-50 50-60 No.of students 2 7 15 10 11 5

6. The mean of five positive integers is twice their median.If four of the integers are 3,4,6,9 and median is 6, then find the fifth integer.

7. The monthly salary of 10 employees in a factory are givan below:
Rs.5000,Rs7000Rs,5000,Rs7000,Rs8000,Rs7000,Rs7000,Rs8000,Rs7000,Rs5000
Find the mean,median and mode.

8. The demand of track suit of different sizes as obtained by a survey is given below

 Size 38 39 40 41 42 43 44 45 No.of persons 36 15 37 13 26 8 6 2
9. Find the mode of the following data

 Marks 0-10 10-20 20-30 30-40 40-50 Number of students 22 38 46 34 20
10. Find the mean,median and mode of the following distribution

 Weight (in kgs) 25-34 35-44 45-54 55-64 65-74 75-84 Number of students 4 8 10 14 8 6