Question

find the mean and median of the given data
Weight (ing) to 40-45 45-50 50-55 55-60 60-65 65-70 70-75.
number of student 2 3 8 6 6 3 2​

Answer 1

Answer: 55-60

may this help

Step-by-stepxplanation:

Answer 2

Answer:-

Weight. Frequency. C.M

40 - 45. 2 2

2 45 - 50 3 5

5 50 - 55 8 13

13 55 - 60 6 19

19 60 - 65 6 25

25 65 - 70 3 28

70 - 75 2 30 =n

We have, n=30

n/2=15

The cumulative frequency just greater than :-

n/2 is 19 and the corresponding class is 55–60.

is 19 and the corresponding class is 55–60.Thus, 55–60 is the median class such that

is 19 and the corresponding class is 55–60.Thus, 55–60 is the median class such that

is 19 and the corresponding class is 55–60.Thus, 55–60 is the median class such that n/2=15,l=55,f=6,cf=13 , and h=5

=15,l=55,f=6,cf=13 , and h=5Substituting these values in the formula

=15,l=55,f=6,cf=13 , and h=5Substituting these values in the formulaMedian, M=l+ n/2-C.F/Fxh

M=55+( 15-13/6)x5

M=55+ 2/6x5=55+1.67=56.67

Hence, the median weight =56.67 kg .

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