Question

(xi - Jr)
10 - 7
15 - 8
20 - 9
25 - 4
30 - 2

The mean is________
(a) 17.66
(b) 15.66
(c) 17.5
(d) 15.5

Answer 1

Answer:

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Answer 2

Hey Dear,

◆ Answer -

Mean = 17.67

◆ Explaination -

For given frequency distribution table,

xi fi => fi.xi

10 7 => 70

15 8 => 120

20 9 => 180

25 4 => 100

30 2 => 60

Total 30 => 530

Mean of the given frequency distribution is calculated by -

Mean = ∑fi.xi / ∑fi

Mean = 530 / 30

Mean = 17.67

Therefore, mean of the given frequency distribution is 17.67.

Hope this helps you...