Q82 of 116 Page 42

Given below is a frequency distribution table. Read it and answer the questions that follow:


(a) What is the lower limit of the second-class interval?


(b) What is the upper limit of the last class interval?


(c) What is the frequency of the third class?


(d) Which interval has a frequency of 10?


(e) Which interval has the lowest frequency?


(f) What is the class size?

(a) Second class interval is 20 – 30


⇒ Its lower limit = 20


(b) Last class interval is 50 – 60


⇒ Its upper limit = 60


(c) The third class is 30 – 40. Its frequency is 4.


(d) The interval that has a frequency of 10 is 20 – 30.


(e) The lowest frequency is 4 which corresponds to the interval 30 – 40.


(f) Class size = Upper Limit – Lower Limit


⇒ Class size is 10.


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