Wxlauslen123
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- Joined
- Jan 17, 2020
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- 18
Can I know the symbol outside the bracket () means?[MATH]P[X>\tau] = 1 - \Phi\left(\dfrac{X-\mu}{\sigma}\right)[/MATH]
They give you a couple values of \(\displaystyle \tau\), you've got the table of \(\displaystyle \Phi(x)\)
Plug and Chug
Can I know the symbol outside the bracket () means?
There's not z score for 0.7, the highest is 0.5, mine is following standard normal distribution tableThere are two unknowns and you can get two equations.
1) Find the Z score to .7, call this number k (since I do not know what it is but you will). k = (8.4-mu)/sd
2) Find the Z score to .25, call this number r (since I do not know what it is but you will). r = (13.2-mu)/sd
Solve the two equations for mu and sd.
0.3?If p(x>8.4) =.7, then p(x<8.4) = ???
You have to think hard and always know that the total area is 1.
Yes.0.3?