Class Notes (835,342)
Langara College (1,809)
STAT 1123 (1)
M.Bednarz (1)
Lecture

# Intervals for the Mean mar26.docx

3 Pages
169 Views

School
Department
Statistics
Course
STAT 1123
Professor
M.Bednarz
Semester
Winter

Description
Mar 26 2013 Opmt1130 Intervals for the Mean  Not knowing the population in business applications means you don’t know he population standard deviation (PSD) either What to do if Sigma is unknown Good News:  use sample standard deviation in place of the PSD  sample mean follows T-distribution Bad News:  sample means are no longer distributed normally o due to the lack of accurate data  using estimation T-Distribution  symmetrical about the mean  flatter in the middle  longer tails than normal distributions  more area in tails  less are in the centre  family of curves o each curve is different  depends on the degrees of freedom (DF) DF= n-1 where n = sample size  As n increases, a better estimate of sig
More Less

Related notes for STAT 1123
Me

OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Join to view

OR

By registering, I agree to the Terms and Privacy Policies
Just a few more details

So we can recommend you notes for your school.