|
Classes |
xi |
fi |
f ixi |
|xi - |
fi|xi - |
|
0-100 |
50 |
4 |
200 |
308 |
1232 |
|
100-200 |
150 |
8 |
1200 |
208 |
1664 |
|
200-300 |
250 |
9 |
2250 |
108 |
972 |
|
300-400 |
350 |
10 |
3500 |
8 |
80 |
|
400-500 |
450 |
7 |
3150 |
92 |
644 |
|
500-600 |
550 |
5 |
2750 |
192 |
960 |
|
600-700 |
650 |
4 |
2600 |
292 |
1168 |
|
700-800 |
750 |
3 |
2250 |
392 |
1176 |
|
Total |
50 |
17900 |
7896 |
|
|
=17900/50 = 358
M.D (
) = 7896/50 = 157.92
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