Special Review Section. Copyright 2014 Pearson Education, Inc.
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1 Special Review Section SRS-1--1
2 Special Review Section Chapter 1: The Where, Why, and How of Data Collection Chapter 2: Graphs, Charts, and Tables Describing Your Data Chapter 3: Describing Data Using Numerical Measures SRS-1--2
3 Transforming Data to Information Data Statistical Tools Information SRS-1--3
4 A Typical Application Sequence Determine a Need for Data Decide on Statistical or Nonstatistical Sampling Define the Population Determine What Data You Will Need Decide How the Data Will Be Collected Determine Data Types and Measurement Level Select Graphic Presentation Tools Compute Numerical Measures Decide on a Census or a Sample Write the Statistical Report SRS-1--4
5 A Typical Application Sequence Determine a Need for Data: Research the issue Analyze business alternatives Respond to request for information Define the Population: All items of interest Determine how to gain access to the population SRS-1--5
6 A Typical Application Sequence Determine What Data You Will Need: Identify the key variables What categorical breakdowns will be needed? Decide How the Data Will Be Collected: Experiment Observation Automation Telephone Survey Written Survey Personal Interview SRS-1--6
7 A Typical Application Sequence Decide on a Census or a Sample: Census: All items in the population Sample: A subset of the population Decide on Statistical or Nonstatistical Sampling: Statistical Sampling: Simple Random Sample Stratied Random Sample Systematic Random Sample Cluster Random Sample Nonstatistical Sampling: Convenience Sampling Judgment Sampling SRS-1--7
8 Data Types and Measurement Level Types of Data Data Timing Quantitative Qualitative Cross- Sectional Time-Series Data Level Nominal Ordinal Interval/Ratio SRS-1--8
9 Graphic Presentation Tools Discrete or Continuous Interval/Ratio Grouped or Ungrouped Data Timing Cross- Sectional Frequency Relative Frequency Cumulative Relative Frequency Joint Frequency Quantitative Timeseries Line Chart Bar Chart (Vertical) Histogram Stem and Leaf Diagram Data Type Scatter Diagram Ogive Box and Whicker Plot Qualitative Frequency Relative Frequency Joint Frequency Categorical/ Nominal/ Ordinal Bar Chart (Vertical or Horizontal) Line Chart SRS-1--9
10 Computing Numerical Measures Mode Ordinal Data Level Nominal Mode Median Ratio/Interval Range Interquartile Range Variation Type of Measures Central Location Median Mean Variance and Standard Deviation Percentiles/ Quartiles Descriptive Analysis & Location Coefficient of Variation Mode Percentiles/ Quartiles Box and Whisker SRS-1--10
11 Writing the Statistical Report Lay the foundation: Provide background and motivation for the analysis Describe the data collection methodology: Explain how the data were gathered and the sampling techniques were used Use a logical sequence: Follow a systematic plan for presenting your findings and analysis Label figures and tables by number: Employ a consistent numbering and labeling format SRS-1--11
12 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. Printed in the United States of America. SRS-1--12
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