To complete the frequency polygon plot we assume a class interval with frequency zero and then ________ .

add one before and one after the given class intervals.

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subtract one after the given class intervals.

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add one before given class intervals.

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subtract one before and one after the given class intervals.

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Solution

The correct option is A
add one before and one after the given class intervals.

To complete the polygon in frequency polygon plot we assume a class interval with frequency zero and add one before and one after the given class intervals to make the area of frequency plot equal to histogram.

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To complete the frequency polygon plot we assume a class interval with frequency zero and add one before and one after the given class intervals

State true or false.
To complete the frequency polygon plot we assume a class interval with frequency zero and add one before and one after the given class intervals.

In a frequency polygon plot why do we add extra class interval with frequency zero, one before and one after the given class intervals?

Given below is the pulse count of 40 patients.

66, 79, 89, 67, 72, 82, 85, 80, 82, 81, 67, 87, 71, 68, 63, 74, 73, 86, 84, 75, 85, 80, 85, 61, 75, 85, 80, 85, 61, 75, 68, 69, 64, 75, 73, 72, 82, 76, 74, 77.
Group the data first in discontinuous class intervals such that one of the class intervals is 70-74.
Next, group the data in continuous class intervals such that one of the class intervals is 85-90.
Find the second class interval and the corresponding frequency of the class for both the groupings of the data.

Q. The heights (in cm) of 30 students of class IX are given below:
155, 158, 154, 158, 160, 148, 149, 150, 153, 159, 161, 148, 157, 153, 157, 162, 159, 151, 154, 156, 152, 156, 160, 152, 147, 155, 163, 155, 157, 153

Prepare a frequency distribution table with 160-164 as one of the class intervals.

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To complete the frequency polygon plot we assume a class interval with frequency zero and then ________ .

The correct option is A add one before and one after the given class intervals. To complete the polygon in frequency polygon plot we assume a class interval with frequency zero and add one before and one after the given class intervals to make the area of frequency plot equal to histogram.

The correct option is A
add one before and one after the given class intervals.

To complete the polygon in frequency polygon plot we assume a class interval with frequency zero and add one before and one after the given class intervals to make the area of frequency plot equal to histogram.