confidence interval

Good Student
Posts: 29
Joined: Thu Oct 04, 2012 2:09 am

confidence interval

Postby madhuri1682 » Mon Nov 12, 2012 12:47 pm

For the standard normal distribution, what is the value of P(-1.87 <= Z <= 1.23) or P(|Z| <= 1.6)?
Choose one answer.
a. 0.5683
b. 0.8794
c. 0.7831
d. 0.9145
how to calculate?


Finance Junkie
Posts: 119
Joined: Mon Sep 17, 2012 11:06 am

Re: confidence interval

Postby swarnendupathak » Mon Nov 12, 2012 12:50 pm

As it is a standard normal distribution, so the problem can be solved by mean = 0 & SD = 1.


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