A frequency distribution table which gives the weights of 38 students of a class is given. Convert it into a continuous grouped frequency.

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Q. Collect the data of weights of students in your class. prepare a grouped frequency distribution table.

Q. The following table gives the frequency distribution of the percentage of marks obtained by 2300 students in a competitive examination.

Marks obtained (in per cent)	11−20	21−30	31−40	41−50	51−60	61−70	71−80
Number of students	141	221	439	529	495	322	153

(a) Convert the given frequency distribution into the continuous form.

(b) Find the median class and write its class mark.

(c) Find the modal class and write its cumulative frequency.

Q. The class intervals in a frequency distribution are:
40 – 44, 45 – 49, 50 – 54,........ If the frequency distribution, is converted into a continuous frequency distribution then the class intervals are _________.

Question 95(ii)

The weights (in kg) of 30 students of a class are as follows :
39, 38, 36, 38, 40, 42, 43, 44, 33, 33, 31, 45, 46, 38, 37,
31, 30, 39, 41, 41, 46, 36, 35, 34, 39, 43, 32, 37, 29, 26
Prepare a frequency distribution table using one class interval as (30-35), 35 not included.
Which class has the maximum frequency ?

Q. A frequency distribution table which gives the weights of 38 students of a class is given. Convert it into a continuous grouped frequency.

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A frequency distribution table which gives the weights of 38 students of a class is given. Convert it into a continuous grouped frequency. ​

A frequency distribution table which gives the weights of 38 students of a class is given. Convert it into a continuous grouped frequency.