Assertion: We find midpoints of a class interval with the following formula. upperclasslimit+lowerclasslimit2 Reason: To draw frequency polygons independently without drawing histogram it is required to have the class mark. Which of the following is correct?
A
Both A and R are true and R is the correct explanation of A
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B
Both A and R are true but R is not the correct explanation of A
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C
A is true and R is false
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D
A is false and R is true
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Solution
The correct option is BBoth A and R are true but R is not the correct explanation of A
A: By definition, this is true R: By definition, this is true To draw the frequency polygon one has to find the class mark. Hence, R is not the correct explanation of A.