Q. 225.0( 2 Votes )

Heights of studen

Answer :

Here, the maximum class frequency is 20.

The class corresponding to this frequency is the modal class. modal class = 160 - 165

lower limit of the modal class (l) = 160

Modal class size (h) = 5

Frequency of the modal class (f1) = 20

Frequency of class preceding the modal class (f0) = 8

Frequency of class succeeding the modal (f2) = 12

Mode is given by,

Mode = 160 + 3 = 163

Hence, the mode is 163 cm.

Mode represents frequency, hence 163 cm is the height of maximum number of students.

To find the mean, we will solve by using direct method.

We have got

Σfi = 60 & Σfixi = 9670

mean is given by

Thus, mean is 161.17

Mean represents average, thus 161.7 cm is the average height of all the students.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

Find the moMathematics - Board Papers