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From Karnataka Open Educational Resources
Activity- statistics problems (view source)
Revision as of 06:06, 14 August 2014
, 06:06, 14 August 2014→Solution:
|Σfd²=85
|Σfd²=85
|}
|}
A=assumed average.<br>
c=4<br>
d=<math>\frac{x-A}{c}</math><br>
assumed mean A=<math>\frac{\sum fx}{n}</math>=<math>\frac{1668}{40}=41.7</math><br>
Standard deviation σ=<math>\sqrt{\frac {\sum {fx^2}}{n}-({\frac{\sum fx}{n})^2}}</math> <br>
Standard deviation σ=<math>\sqrt{\frac {\sum {fx^2}}{n}-({\frac{\sum fx}{n})^2}}</math> <br>
