Q. 64.5( 11 Votes )
Let us find the median of length of diameter from the following frequency distribution table of length of diameter of pipe.
Answer :
To find out median, we need to calculate cumulative frequency for the given data.
Let us make a table for that.
Here, n = 80, that is, n = even.
Since, n is even, median can be found out as:
⇒ 
⇒ Median = The mean of 40th and 41th observations
And we know that, 40th observation = 22 [∵ 40 comes between 33 and 57]
And 41th observation = 22 [∵ 41 comes between 33 and 57]
Median = Mean of 22 and 22
⇒ 
⇒ 
⇒ Median = 22
Thus, median = 22.
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The Heterotrophic Mode44 mins
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