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Find Standard Deviation and Coefficient of Variation for grouped data
 Type your data in either horizontal or verical format, for seperator you can use '-' or ',' or ';' or space or tab for sample click random button OR X & Frequency   Class & Frequency Rows : Click On Generate
1.  Class 2 - 4 4 - 6 6 - 8 8 - 10 Frequency 3 4 2 1
2.  Class 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45 45 - 50 Frequency 110 170 80 45 40 35
3.  Class 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60 60 - 70 70 - 80 Frequency 15 25 20 12 8 5 3
4.  X 0 1 2 3 4 Frequency 1 5 10 6 3
5.  X 10 11 12 13 14 Frequency 3 12 18 12 3
6.  X 1.75 1.72 1.73 1.76 1.71 1.8 1.87 2.34 Frequency 3 2 4 5 6 2 7 1
7.  X 0 1 2 3 4 Frequency 27 9 7 5 2
8.  X 0 1 2 3 4 Frequency 17 9 6 5 3
9.  Class -40 - -30 -30 - -20 -20 - -10 -10 - 0 0 - 10 10 - 20 20 - 30 30 - 40 Frequency 7 10 10 20 57 23 13 10
10.  Class 0 - 2 2 - 4 4 - 6 6 - 8 8 - 10 10 - 12 Frequency 5 16 13 7 5 4
11.  Class 0 - 2 2 - 4 4 - 6 6 - 8 8 - 10 10 - 12 Frequency 2 7 12 19 9 1
12.  Class 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45 45 - 50 50 - 55 55 - 60 Frequency 3 9 14 20 35 9 6 2 2
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