'Standard deviation s' diaporamas de présentation

Chapter 6

Chapter 6. Confidence Intervals. Chapter Outline. 6.1 Confidence Intervals for the Mean (Large Samples) 6.2 Confidence Intervals for the Mean (Small Samples) 6.3 Confidence Intervals for Population Proportions

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Lecture 2

Lecture 2. Describing data with graphs and numbers. Normal Distribution. Data relationships. Describing distributions with numbers. Mean Median Quartiles Five number summary. Boxplots Standard deviation. Mean. The mean The arithmetic mean of a data set (average value) Denoted by .

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Chapter 7 Hypothesis Testing

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Planning, Running, and Analyzing Controlled Experiments on the Web

Part 2. Planning, Running, and Analyzing Controlled Experiments on the Web. Roger Longbotham, Mgr Analytics, Experimentation Platform, Microsoft. Slides available at http://exp-platform.com. Planning and Analysis of Online Experiments. What to measure How to compare Treatment to Control

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Introduction to Probability and Statistics Thirteenth Edition

Introduction to Probability and Statistics Thirteenth Edition. Chapter 2 Describing Data with Numerical Measures. Describing Data with Numerical Measures. Graphical methods may not always be sufficient for describing data.

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Chapter 2 Describing Data with Numerical Measurements

Chapter 2 Describing Data with Numerical Measurements. General Objectives:

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Use of moment generating functions

Use of moment generating functions. Definition. Let X denote a random variable with probability density function f ( x ) if continuous (probability mass function p ( x ) if discrete) Then m X ( t ) = the moment generating function of X.

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Discrete Random Variables and Probability Distributions

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Network Simulation

Motivation: learn fundamentals of evaluating network performance via simulation. Overview: fundamentals of discrete event simulation analyzing simulation outputs ns-2 simulation. Network Simulation. The evaluation spectrum. simulation. prototype. numerical models. emulation.

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Chapter 8

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Section 3-3

Section 3-3. Measures of Variation. WAITING TIMES AT DIFFERENT BANKS. All the measures of center are equal for both banks. Mean = 7.15 min Median = 7.20 min Mode = 7.7 min Midrange = 7.10 min. RANGE.

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would mean in 5 minutes we should expect to count about 6,000 events B . 12,000 events

Example: a measured rate of. 1200 Hz = 1200 /sec. would mean in 5 minutes we should expect to count about 6,000 events B . 12,000 events C . 72,000 events D . 360,000 events E . 480,000 events F . 720,000 events. Example: a measured rate of. 1200 Hz = 1200 /sec.

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Sampling distributions for sample means

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Problem definition and Analysis

Problem definition and Analysis. Scope. Define what to study (and what not). Too much = wasted work!. Key object classes (order, delivery, ...) and actions. Actions cause state change of objects. Necessary for understanding and modeling. Performance indicators

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LECTURE 36: STATISTICAL SIGNIFICANCE AND CONFIDENCE

LECTURE 36: STATISTICAL SIGNIFICANCE AND CONFIDENCE. Objectives: Statistical Significance Hypothesis Testing Confidence Intervals Applications Confidence Measures Word Posteriors

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LECTURE 28: STATISTICAL SIGNIFICANCE AND CONFIDENCE

LECTURE 28: STATISTICAL SIGNIFICANCE AND CONFIDENCE. Objectives: Statistical Significance Hypothesis Testing Confidence Intervals Applications Confidence Measures Word Posteriors

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The Mighty Central Limit Theorem!

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LECTURE 37: STATISTICAL SIGNIFICANCE (CONT.)

LECTURE 37: STATISTICAL SIGNIFICANCE (CONT.) . Objectives: Statistical Significance Hypothesis Testing Confidence Intervals Applications Confidence Measures Word Posteriors

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__________________________________________

Class Monday, Oct 4, 2004. __________________________________________. Exam 1. __________________________________________.

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Chapter 11: Random Sampling and Sampling Distributions

Chapter 11: Random Sampling and Sampling Distributions. If we draw n=9 values (X) from a population that we know is normally distributed with a mean of 100 and a standard deviation of 15 (like IQs), what can we say about the distribution of the mean of these values?

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