Department

GeographyCourse Code

GGR270H1Professor

Damian DupuyStudy Guide

FinalThis

**preview**shows page 1. to view the full**4 pages of the document.**GGR 270 – Lecture 8 – November 3, 2010-12-13

1-á á á/2Z á/2

.90 .10 .05 1.645

.95 .05 .025 1.96

.98 .02 .01 2.33

.99 .01 .005 2.58

Point Estimate

¯x is the best point estimate of µ

Z (Standard Error)

Z(

Z defines level of confidence

95% = 1.96 (

90% = 1.65(

99% = 2.58(

Also have point estimate for proportions:

Z

Confidence Interval

Place interval around the sample mean (¯x) and state with a measurable level of confidence,

the true population mean (µ) lies within this interval

¯x +/-

Or

¯x +/-

www.notesolution.com

###### You're Reading a Preview

Unlock to view full version