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Introduction to Statistics: Sampling Methods and Data Analysis

Learn about sampling methods, population data, and statistical analysis in this elementary statistics lecture preview. Understand the importance of collecting sample data and drawing conclusions about larger groups through data analysis.

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Introduction to Statistics: Sampling Methods and Data Analysis

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  1. Lecture Slides Elementary StatisticsTwelfth Edition and the Triola Statistics Series by Mario F. Triola

  2. Preview Polls, studies, surveys and other data collecting tools collect data from a small part of a larger group so that we can learn something about the larger group. This is a common and important goal of statistics: Learn about a large group by examining data from some of its members.

  3. Preview In this context, the terms sample and population have special meaning. Formal definitions for these and other basic terms will be given here. In this chapter, we will look at some of the ways to describe data.

  4. Chapter 1Introduction to Statistics 1-1 Review and Preview 1-2 Statistical and Critical Thinking 1-3 Types of Data 1-4 Collecting Sample Data

  5. Data - Collections ofobservations, such as measurements, genders, or survey responses Data

  6. Statistics - The science of planning studies and experiments, obtaining data, and then organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on the data Statistics

  7. Population - The complete collection of all measurements or data that are being considered Population

  8. Census versus Sample • Census - Collection of data from every member of a population • Sample - Subcollection of members selected from a population

  9. Example • The Gallup corporation collected data from 1013 adults in the United States. Results showed that 66% of the respondents worried about identity theft. • The population consists of all 241,472,385 adults in the United States. • The sample consists of the 1013 polled adults. • The objective is to use the sample data as a basis for drawing a conclusion about the whole population.

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