EvoRevolution
Member
- Joined
- Jan 25, 2009
- Messages
- 123
- Gender
- Male
- HSC
- 2009
same question somethin was wrong with the other 1
![](https://latex.codecogs.com/png.latex?\bg_white %5C120dpi%20The%5C%20%22normal%5C%20distribution%5C%20with%5C%20mean%5C%20%5Cmu%5C%20and%5C%20standard%5C%20deviation%5C%20%5Csigma%22%20%5C%5Cis%5C%20used%5C%20in%5C%20the%5C%20HSC%5C%20to%5C%20scale%5C%20marks.%5C%20Its%5C%20shape%5C%20is%5C%20given%5C%20by%5C%20the%5C%20%22density%5C%20function%5C%22:%20%5C%5C%20%5C%5C%20%5CPhi%28x%29%20=%20%5Cfrac%7B1%7D%7B%5Csqrt%7B2%7D%5Cpi%20%5Csigma%20%7De%5E%7B%5Cfrac%7B-%28x-%5Cmu%29%5E2%7D%7B2%5Csigma%5E2%7D%7D%20%5C%5C%20%5C%5C%20%28a%29%20find%5C%20%5CPsi%20%28x%29%20%5C,%20the%5C%20density%5C%20function%5Cfor%5C%20a%5C%20standard%5C%20deviation%5C%20of%5C%20unity%5C%20and%5C%20a%5C%20mean%5C%20of%5C%20zero%5C%5C%20%5C%5C%20%28b%29%20Evaluate%20%5Cint_%7B0%7D%5E%7Ba%7Dx%5CPsi%20%28x%29dx,%20where%5C%20a%20%5Cin%20R,%20a%20%3E%200.)
Note: I switched limits because of a negative that comes out when you use reverse chain rule.
An exponential of 0 gives 1, not 0...
Note: I switched limits because of a negative that comes out when you use reverse chain rule.
lolAn exponential of 0 gives 1, not 0...
dw about it.Jeezus -.- I've been at home all day, i'm going nuts.