Lecture Mar20

If we monitor and record the lifetimes of a sample of

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: nitor and record the lifetimes of a sample of 80 iPhones, (a) What is the probability that the mean of the sample is larger than 950 days? (b) What is the probability that the mean of the sample is between 875 and 900 days? Standard Normal RVs A Normal RV that has mean and variance is called a Standard Normal RV. The importance of Standard Normal RVs has to do with the following fact: (1) If is a Normal RV with mean and variance then is a Standard Normal RV. That is, we can always obtain a Standard Normal RV (and thus work with the probability density function of a standard normal RV) if we have a Normal RV. All this leads to...
View Full Document

This document was uploaded on 03/24/2014 for the course STAT 1131 at Yeshiva.

Ask a homework question - tutors are online