CASE STUDY QUESTION 4-Class X-Maths

CASE STUDY QUESTION 4-Class X-Maths

A group of students decided to make a project on Statistics. They are collecting the heights (in cm) of their 51 girls of Class X-A, B and C of their school. After collecting the data, they arranged the data in the following less than cumulative frequency distribution table form:

(a) What is the lower limit of median class?
(i) 145 (ii) 150 (iii) 155 (iv) 160

(b) What is the upper limit of modal class?
(i) 145 (ii) 150 (iii) 155 (iv) 160

(c) What is the mean of lower limits of median and modal class?
(i) 145 (ii) 150 (iii) 155 (iv) 160

(d) What is the width of the class?
(i) 10 (ii) 15 (iii) 5 (iv) none of these

(e) The median is :
(i) 149.03 cm (ii) 146.03 cm
(iii) 147.03 cm (iv) 148.03 cm

Answers:

a. (i) 145

b. (ii) 150

c. (i) 145

d. (iii) 5

e. (i) 149.03 cm