Question

10. The frequency distribution of weights (in kg) of 40 persons of a locality is given below
Weights (in kg)
Frequency
40-45
45-50
50–55
55-60
60-65
4
12
13
6
5​

Answer 1

Step-by-step explanation:

Weight (in kg) Number of students

(Frequency) Cumulative

Frequency

40 - 45 2 2

45 - 50 3 5

50 - 55 8 13

55 - 60 6 19

60 - 65 6 25

65 - 70 3 28

70 - 75 2 30 =n

We have, n=30

2

n

=15

The cumulative frequency just greater than

2

n

is 19 and the corresponding class is 55–60.

Thus, 55–60 is the median class such that

2

n

=15,l=55,f=6,cf=13 , and h=5

Substituting these values in the formula

Median, M=l+

⎝

⎜

⎛

f

2

n

−cf

⎠

⎟

⎞

×h

M=55+(

6

15−13

)×5

M=55+

6

2

×5=55+1.67=56.67

Hence, the median weight =56.67 kg .

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Answer 2

Answer:

No I have no answer but i tried this question