Q17 of 145 Page 410

Median = ?

Medium is given by,



Where


N = Sum of frequencies,


h = length of median class,


l = lower boundary of the median class,


f = frequency of median class


and Cf = cumulative frequency

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15

Consider the following frequency distribution:





















Class



0 - 10



10 - 20



20 - 30



30 - 40



40 - 50



50 - 60



Frequency



3



9



15



30



18



5



The modal class is

 16

Mode = ?

 18

If the mean and median of a set of numbers are 8.9 and 9 respectively then the mode will be

 19

Look at the frequency distribution table given below:

















Class interval



35 - 45



45 - 55



55 - 65



65 - 75



Frequency



8



12



20



10



The median of the above distribution is