Which of the following statement(s) is/are included in the steps of constructing a frequency curve for a grouped frequency distribution?

Find the class marks of different classes.

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Calculate the length of the bars.

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Joining consecutive points by free hand.

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Choose the suitable scale.

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Solution

The correct options are
A Find the class marks of different classes.
C Joining consecutive points by free hand.
D Choose the suitable scale.
Steps of constructing a frequency curve are given below.

1. Find the class marks of different classes.

2. Select the scale for both X-axis and Y-axis.

3. Plot class marks and corresponding frequency on the graph.

4. Join them the consecutive points by free hand curve.

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Similar questions

Q. A grouped frequency distribution table with classes of equal size, using 63-72 (72 included) as one of the classes, is constructed for the following data:
30, 32, 45, 54, 74, 78, 108, 112, 66, 76, 88, 40, 14, 20, 15, 35, 44, 66, 75, 84, 95, 96, 102, 110, 88, 74, 112, 14, 34, 44
The number of classes in the distribution will be __________.

Q. Ages of 60 teachers in primary schools of a Mandal are given in the following frequency distribution table. Construct the Frequency polygon and frequency curve for the data without using the histogram. (Use separate graph sheets)

Ages	24-28	28-32	32-36	36-40	40-44	44-48
No of teachers	12	10	15	9	8	6

Question 100(ii)

Construct a frequency distribution table for the following weights (in grams) of 35 mangoes, using the equal class intervals, one of them is 40-45 (45 not included):
30, 40, 45, 32, 43, 50, 55, 62, 70, 70, 61, 62, 53, 52, 50, 42, 35, 37,
53, 55, 65, 70, 73, 74, 45, 46, 58, 59, 60, 62, 74, 34, 35, 70, 68
Which weight group has the highest frequency ?

Q. Construction of frequency polygon for a grouped frequency distribution can be done ___________.

Q. Question 9
A grouped frequency distribution table with classes of equal sizes using 63 - 72 (72 included) as one of the class is constructed for the following data.

30, 32, 45, 54, 74, 78, 108, 112, 66, 76, 88

40, 14, 20, 15, 35, 44, 66, 75, 84, 95, 96

102, 110, 88, 74, 112, 14, 34, 44.
The number of classes in the distribution will be:

A) 9
B) 10
C) 11
D) 12

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