Math 227 Elementary Statistics

Math 227 Elementary Statistics

Bluman 5th edition

CHAPTER 3

Data Description

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Objectives

Summarize data using measures of central tendency, such as the mean, median, mode, and midrange.

Describe data using the measures of variation, such as the range, variance, and standard deviation.

Identify the position of a data value in a data set using various measures of position, such as percentiles, deciles, and quartiles.

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Objectives (cont.)

Use the techniques of exploratory data analysis, including boxplots and fivenumber summaries to discover various aspects of data.

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Introduction

Measures of average are called measures of central tendency and include the mean, median , mode, and midrange. *Loosely stated, the average means the center of the distribution or the most typical case.

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