Question
Download Solution PDFFollowing histogram shows certain frequency distribution against class intervals.
The approximated mean of this distribution is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFFormula
Mean = ∑fx/∑f
Calculation
|
Interval |
Mid – point (x) |
Frequency (f) |
Fx |
|
10 – 20 |
15 |
8 |
120 |
|
20 – 30 |
25 |
20 |
500 |
|
30 – 40 |
35 |
16 |
560 |
|
40 – 50 |
45 |
24 |
1080 |
|
50 – 60 |
55 |
12 |
660 |
|
60 – 70 |
65 |
4 |
260 |
|
Total |
|
84 |
3180 |
⇒ Mean = 3180/84
∴ The Mean is 37.86 (approx)
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