Stat 1124 - Confidence Intervals

Stat 1124 - Confidence Intervals - STAT 1124 Statistical...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
STAT 1124 Statistical Methods – I Confidence Intervals – CH 14 Albert Wong, Ph.D. Langara College January 2009 Statistical Inference • Statistical Inference: Methods for drawing conclusions about a population from sample data • Two major Types of inference: ¾ Estimation: Point (statistic) and Interval estimation (confidence intervals) ¾ Hypothesis Testing
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Inference About the Population Mean – A Simple Case • We have a simple random sample (SRS) from the population of interest • The variable that we measure has a Normal distribution with mean μ and standard deviation σ . • We do not know about the population mean μ but we do know about the population standard deviation σ . • The above conditions are called the “simple conditions” in the text. They are the ideal conditions that we probably would not have in practice • We wish to use the sample to estimate μ. Estimating the Population Mean • We use the sample mean to estimate the population mean μ • We do not expect that the sample mean to be exactly equal to μ. • Note that the sampling distribution of the sample mean is N(μ,
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/14/2010 for the course STATS 1124 taught by Professor Michael during the Summer '09 term at Langara.

Page1 / 4

Stat 1124 - Confidence Intervals - STAT 1124 Statistical...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online