Let us now consider the following frequency distribution table which gives the weights of 38 students of a class :

Convert the classes of above frequency distribution to continuous classes to include two new students weighing 35.5 kg and 40.5 kg.

The distribution below gives the weights of 30 students of a class. Find the median weight of the students.

Consider the frequency distribution tabe (Table 3, sum no . 4 of ''Sums to Enrich 'Remember''' Chapter 14) , which gives the weights of 38 students of class. Find the probability that the weight of a student in the class lies in the interval 46 - 50 kg.

The weights (in kg) of 30 girls of Primestreet Society are as below: Prepare a frequency distribution with classes 30-35, 35-40 ....

Consider the marks obtained (out of 100 marks) by 30 students of Class IX of a school : Represent this data in a frequency distribution table

In sum you were asked to prepare a frequency distribution table regarding the blood groups of 30 students of a class. Use this table to determine the probability that a student of this class, selected at random, has blood group AB.

The marks scored by 40 students in a Mathematics test are given below: Prepare the frequency distribution with classes 0-4, 5-9.....

The marks scored by 40 students in a 60 mark test of english are as follows , Prepare the frequency distribution with classes 0-9,10-19,…..

The lengths of 40 leaves of a plant are measured correct to the nearest millimetre, and the data obtained is represented in the following table: Find the median length of the leaves. (Hint: The data needs to be converted to continuous classes for finding the median , since the formula assumes continuous classes. The classes then change to 117.5-126.5, 126.5-135.5, .......171.5-180.5.)

There are 60 students in a class . The following is the frequency distribution of the marks obtained by the student in a test. Where x is a positive integer. Determine the mean and standard deviation of the marks.