Hi

Can someone help me on the following questions:

Determine the value of z in the following case: Pr(-z<Z<z)=0.954

I done InvNorm(0.954,0,1) but this is incorrect

Find the quartiles of the standard normal distribution?

P.S

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- Aug 31st 2011, 12:28 AMPaymemoneyNormal Distribution question
Hi

Can someone help me on the following questions:

Determine the value of z in the following case: Pr(-z<Z<z)=0.954

I done InvNorm(0.954,0,1) but this is incorrect

Find the quartiles of the standard normal distribution?

P.S - Aug 31st 2011, 12:46 AMBAdhiRe: Normal Distribution question
first find the $\displaystyle \textrm{P}(Z<z)$

it will be equal to $\displaystyle \frac{0.954}{2}+0.5=0.977$

so find z according to that value from the data sheet - Aug 31st 2011, 01:02 AMPaymemoneyRe: Normal Distribution question
- Aug 31st 2011, 01:17 AMBAdhiRe: Normal Distribution question
because normally on datasheets, $\displaystyle \textrm{P}(Z<z)$ is given,

so after halving 0.954 you'll get $\displaystyle \textrm{P}(0<Z<z)$. In order to get the above value you should add 0.5 (because the graph is symmetrical around P(z) axis) - Aug 31st 2011, 04:05 PMPaymemoneyRe: Normal Distribution question
How would i find the quartiles of the standard normal distribution?

i know that there it is split into three sections, but how do i calculate the percentages - Aug 31st 2011, 06:49 PMmr fantasticRe: Normal Distribution question