For calculating the mean of grouped data, the midpoint of each class interval is chosen to represent all the observations from that class.

True

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False

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Solution

The correct option is A
True

For calculating the mean of grouped data, the midpoint of each class interval is chosen to represent all the observations from that class. The midpoint is called the class mark.

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For calculating mean of grouped data, the mid point of each class interval is chosen to represent all the observations from that class.

Q. For finding the mean value of the grouped data it is assumed that the frequency of each class interval is not centred around its mid-point.

State True or False : The class mark for a class interval while calculating the mean is its upper limit.

Consider a grouped data distribution for which the mean is found by assumed mean method.

P = sum of the products of ‘d’ and frequency for each class interval

Here $d_{i} = x_{i} - A$

Q = total number of observations

A = assumed mean

M = mean of given grouped data distribution

Which of the following statements is true?

State true or false.
The height of a histogram represents the frequency of the data of a class interval and width of the histogram represents class width.

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For calculating the mean of grouped data, the midpoint of each class interval is chosen to represent all the observations from that class.

The correct option is A True For calculating the mean of grouped data, the midpoint of each class interval is chosen to represent all the observations from that class. The midpoint is called the class mark.

The correct option is A
True

For calculating the mean of grouped data, the midpoint of each class interval is chosen to represent all the observations from that class. The midpoint is called the class mark.