Chapter 9 Lecture Outline

# Chapter 9 Lecture Outline - CHAPTER 9 Sampling...

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CHAPTER 9 Sampling Distributions for Proportions and Means Notation Population proportion p Sample proportion p ˆ Population mean µ Sample mean x Population standard deviation Sample standard deviation s In this course, we will use two different types of statistical inference – procedures for making conclusions about population parameters based on sample statistics. 1. Confidence Intervals – an interval of values that should cover the true parameter 2. Hypothesis testing – used to test the plausibility of a predetermined hypothesis about the true parameter a. Uses a null value – a value indicating that nothing new is happening with the parameter b. Determines statistical significance – rejecting the idea that the observed results are plausible if the null value is correct In this course, we will create confidence intervals and conduct hypotheses tests for the following parameters:

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Parameter Statistic One proportion: p p ˆ Two proportions: p 1 -p 2 2 1 ˆ ˆ p p - One mean: μ x Mean of paired differences: μ d d
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## This note was uploaded on 03/30/2008 for the course L I R 201 taught by Professor Willits,billie during the Spring '07 term at Pennsylvania State University, University Park.

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Chapter 9 Lecture Outline - CHAPTER 9 Sampling...

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