Question

1.
Class boundaries are taken on the 'X’-axis. Why not class limits?​

Answer 1

SOLUTION

TO DETERMINE

Class boundaries are taken on x axis. Why not class limits

CONCEPT TO BE IMPLEMENTED

CLASS INTERVAL

When the number of sample values are large in number and are in wide range, then the whole data is divided in a number of several groups according to the size of the sample. Each of these groups, made as above, is known as class interval

CLASS LENGTH

Length of the class interval of an class is defined to be the difference between the lower and upper class boundaries ( not class limits) of that particular class interval.

Class length = Upper Class boundary - Lower class boundary

CLASS FREQUENCY

The number of observed values falling within a class is called the frequency of that class

EVALUATION

In a grouped frequency table, the class limits are changed into class boundaries to make it continuous series and class boundaries are plotted along horizontal axis i.e. x axis, choosing suitable units of measurement

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Learn more from Brainly :-

$1.$ Frequency density corresponding to a

class interval is the ratio of

a) Class frequency to the total frequency

b) Clas

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2. If x is random variable,then var(2-3x) is

1. 2-var(3x)

2. var(2)-var(3x)

3. 2-3var(x)

4. 9var(x)

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