First figure out what's p(10) is. Hint: the sum of pmf must equal 1.Okay so I have this exam prep but I dont really understand how I am supposed to solve this. Can anyone help?View attachment 32015
Seriously, I don't know why I stuck on that question for so long. Thanks!First figure out what's p(10) is. Hint: the sum of pmf must equal 1.
Next, compose the F(x).
No the answer is [imath]\dfrac{4}{10}[/imath] they must add to [imath]1[/imath]Seriously, I don't know why I stuck on that question for so long. Thanks!
*The answer is 4/5
The F(17) is 8/10 -> 4/5. I assume you're talking about the p(10).No the answer is [imath]\dfrac{4}{10}[/imath] they must add to [imath]1[/imath]
Well, my bad, I had in mind that F(a)=8/10 if 15<=a<20 .[math]F(a) = \begin{cases} 0 &\text{if } a<0 \\ 1/10 &\text{if } 0\le a <5 \\ 5/10 &\text{if } 5\le a <10 \\ 8/10 &\text{if } 10\le a <15 \\ 1 &\text{if } a\ge15 \\ \end{cases}[/math]I don't see how the answer can be 4/5.
Correction:[math]F(a) = \begin{cases} 0 &\text{if } a<0 \\ 1/10 &\text{if } 0\le a <5 \\ 5/10 &\text{if } 5\le a <10 \\ 8/10 &\text{if } 10\le a <15 \\ 1 &\text{if } a\ge15 \\ \end{cases}[/math]I don't see how the answer can be 4/5.