# Statistics-Important Questions

STATISTICS
HIGH ORDER THINKING QUESTIONS
1.   What measure of central tendency is used to obtain graphically as the x-coordinate of meeting point of the two ogives for grouped data?
2.   The percentage marks obtained by 100 students in an examination are given below: Find median.
 Marks 30-35 35-40 40-45 45-50 50-55 55-60 60-65 Frequency 10 16 18 23 18 8 7
3.   The median of the following frequency distribution is 35. Find the value of x.
 C.I. f 0-10 2 10-20 3 20-30 X 30-40 6 40-50 5 50-60 3 60-70 2
Also find the modal class.
4.   Draw the cumulative frequency curve by more than method from the following data:
 income Number of persons 0-1000 7 1000-2000 15 2000-3000 35 3000-4000 28 4000-5000 10 5000-6000 5
5.   The mean of the following distribution is 18.
 Classinterval 11-13 13-15 15-17 17-19 19-21 21-23 23-25 Frequencies 3 6 9 13 f 5 4
Find f.
6.   The percentage of marks obtained by 100 students in an examination are given below:
 Marks 30-35 35-40 40-45 45-50 50-55 55-60 60-65 Frequency 14 16 18 23 18 8 3
Find the median of the above data.
7.   Draw a ‘less than ogive’ for the following data:
 Class 1-4 4-7 7-10 10-13 13-16 16-19 Frequency 6 30 40 16 4 4
8.   Find the mean, median and the mode of the following frequency distribution.
 Class 0-10 10-20 20-30 30-40 40-50 50-60 60-70 frequency 4 5 7 10 12 8 4
9.   Find the mean of the following
 Class 200-201 201-202 202-203 203-204 204-205 205-206 frequency 13 27 18 10 1 1
10.   Find the mean of the following data:
 Class 0-10 10-20 20-30 30-40 40-50 frequency 20 24 40 36 20