'True population parameter' diaporamas de présentation

Lecture 4

Lecture 4 . Statistical Inference. Inference for one population mean and one population proportion. x. 6.1. Uncertainty and confidence. Although the sample mean, , is a unique number for any particular sample, if you pick a different sample you will probably get a different sample mean.

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Section 4: Parameter Estimation

Section 4: Parameter Estimation. ESTIMATION THEORY - INTRODUCTION.

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Section 4: Parameter Estimation

Section 4: Parameter Estimation. ESTIMATION THEORY - INTRODUCTION.

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Heteroske...what?

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CRITICAL NUMBERS SAMPLING WITH CONFIDENCE

CRITICAL NUMBERS SAMPLING WITH CONFIDENCE. Last week we looked at:. Displaying data using stem & leaf plots, histograms, bar charts and box & whisker plots The summary measures: mean, median, mode, range, interquartile range, standard deviation Elementary properties of the Normal distribution.

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Confidence Intervals

Confidence Intervals. Rate your confidence 0 - 100. Name my age within 10 years? within 5 years? within 1 year? Shooting a basketball at a wading pool, will make basket? Shooting the ball at a large trash can, will make basket? Shooting the ball at a carnival, will make basket?.

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AP Statistics: Section 9.1 Sampling Distributions

AP Statistics: Section 9.1 Sampling Distributions. What is the usual way to gain information about some characteristic of a population ?.

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AMOs 101 Understanding Annual Measurable Objectives

AMOs 101 Understanding Annual Measurable Objectives. Office of Educational Accountability Wisconsin Department of Public Instruction November 2012. AMO Background. Background.

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Psyc 235: Introduction to Statistics

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Some statistical basics

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Unit 7 Statistical Inference - 1 Estimation FPP Chapters 21,23, 26-29

Point Estimation Margin of Error Interval Estimation - Confidence Intervals Sample Size Computations Next: Statistical Tests of Hypotheses -Hypothesis Testing. Unit 7 Statistical Inference - 1 Estimation FPP Chapters 21,23, 26-29. A.05. Box models :

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Ch. 9 Fundamental of Hypothesis Testing

Ch. 9 Fundamental of Hypothesis Testing. There two types of statistical inferences, Estimation and Hypothesis Testing Hypothesis Testing: A hypothesis is a claim (assumption) about one or more population parameters. Average price of a six-pack in the U.S. is ? = $4.90

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Chapter 16 Inferential Statistics

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Warm Up

Warm Up. For each of the following please state the population, sample, parameter, and statistic.

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Confidence Intervals

Confidence Intervals. W&W, Chapter 8. Confidence Intervals.

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What are the mean and standard deviation of the sample mean length of pregnancy of these 15 pregnancies?

Warm UP!. The length of human pregnancies from conception to birth varies according to a distribution that is approximately normal with mean 264 days and standard deviation 16 days. Consider 15 pregnant women from a rural area. Assume they are equivalent to a random sample from all women.

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Political Science 30: Political Inquiry

Political Science 30: Political Inquiry . The Magic of the Normal Curve. Normal Curves ( Essentials , pp. 127-130) The family of normal curves The rule of 68-95-99.7 The Central Limit Theorem ( Essentials , p. 127) Confidence Intervals ( Essentials , pp. 130-134) Around a Mean

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Regression vs. Correlation

Regression vs. Correlation. Both : Two variables Continuous data Regression : Change in X causes change in Y Independent and dependent variables or Predict X based on Y Correlation : No dependence (causation) assumed Estimate the degree to which 2 variables vary together.

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STA 291 Summer 2010

STA 291 Summer 2010. Lecture 12 Dustin Lueker. Central Limit Theorem. For random sampling, as the sample size n grows, the sampling distribution of the sample mean, , approaches a normal distribution Amazing: This is the case even if the population distribution is discrete or highly skewed

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