Lecture_09_28

# Lecture_09_28 - Lecture of September 28 From Last Class Why...

This preview shows pages 1–4. Sign up to view the full content.

1 Lecture of September 28 Lecture of September 28 •F r o m L a s t C l a s s - Why we need statistical inference? - Three types of inference methods - A four-step procedure • HW#4 due in class on 10/03.

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

View Full Document
2 Procedures for Inferences Procedures for Inferences Basic Procedure (1) Collect random sample data from a population; (2) Calculate some statistic (typically some point estimate) from the sampled data that is related to the population parameters; (3) Determine the distribution of that statistic (4) Follow certain procedure, make inference (or conclusion) regarding the population parameters using (a) confidence intervals; or (b) hypothesis test method.
3 Consider Normal Distribution Consider Normal Distribution •L e t x denote a quality characteristic that follows N ( µ , σ 2 ), where µ and σ 2 are the population parameters we'd like to know about. (1) Let { x 1 , x 2 , …, x n } be a random sample of n observations, (2) Point estimate of µ , σ 2 , and σ -- these are statistics related

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

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

## This note was uploaded on 02/14/2011 for the course ISEN 314 taught by Professor M during the Fall '10 term at Texas A&M.

### Page1 / 12

Lecture_09_28 - Lecture of September 28 From Last Class Why...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online