Question

Evaluate width of class interval 50 - 80​

Answer 1

Answer:

upper limit+ lower limit / 2

50+80/2

130/2

= 65( class mark)

Answer 2

Given Class Interval 50-80

To Find : Evaluate width of class interval

Solution:

Class size or Class width is the span between two consecutive lower class limits, calculated as their difference.

or Class Size is the difference between upper boundary - lower boundary of class interval

The class boundary is the number that closes the gap between the upper limit of one class and the lower limit of the following class.

It is the value exactly halfway between those two limits.

As only one class interval is given so assuming

that class limit and boundaries are equal

Hence  Class Size / width =80 - 50  = 30

width of class interval 50 - 80​ is 30

Additional Info:

Class Mark  or  Class Midpoint

Class midpoint is the middle value of a certain class. It is determined as the arithmetic mean of the lower and upper limit of the class.

Class Marks = (50 + 80)/2  = 65

Class Marks is 65

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