Thread: Normal 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

first find the

it will be equal to

so find z according to that value from the data sheet

Originally Posted by BAdhi

first find the

it will be equal to

why do you have to plus 0.5 after halving 0.954?

because normally on datasheets, is given,

so after halving 0.954 you'll get . In order to get the above value you should add 0.5 (because the graph is symmetrical around P(z) axis)

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

Originally Posted by Paymemoney

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

Rview the definition of a quartile. Then apply what you learned so far in this thread.