Hello, can someone please help me, Im stuck with this:

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- May 3rd 2010, 10:41 AM #1

- Joined
- May 2010
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- 1

- May 3rd 2010, 12:09 PM #2
For CDF $\displaystyle F(x)$ and PDF $\displaystyle f(x),$ we have the relation...

$\displaystyle \frac{d}{dx}F(x) = f(x)$

Also, you know $\displaystyle \int_a^b f(x) = 1$ where $\displaystyle x$ is defined on $\displaystyle a<x<b...$ You can use this fact to find $\displaystyle K.$

For the last part note that $\displaystyle F(x) = P(X\leq x)$ and $\displaystyle F(x)$ is given. Also, $\displaystyle P(a\leq x \leq b) = \int_a^b f(x)dx.$

Show me where you are stuck, and I will help you proceed.