4. Analyzing Data
Published Online: 29 AUG 2012
Copyright © 2011 John Wiley & Sons, Inc. All rights reserved.
Basic Statistical Tools for Improving Quality
How to Cite
Kang, C. W. and Kvam, P. H. (2011) Analyzing Data, in Basic Statistical Tools for Improving Quality, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9781118491751.ch4
- Published Online: 29 AUG 2012
- Published Print: 8 APR 2011
Print ISBN: 9780470889497
Online ISBN: 9781118491751
- analyzing data;
- confidence intervals;
- probability plot
Science is a systematic way of collecting data about nature and summarizing that knowledge into testable laws and theories. This chapter investigates how to quantify this knowledge through the use of confidence intervals and tests of hypotheses. It discusses how confidence intervals can help quantify uncertainty in a simple way. Like a confidence interval, a test of hypothesis helps us gauge uncertainty in an estimate. Unlike a confidence interval, this test will make a decision on whether the sample mean is large, small or sufficiently close to a target value. The probability plot provides us with a graph of the data points that have been re-scaled so that if the distribution of the data is normal, the graph will appear as a straight line.
Controlled Vocabulary Terms
confidence interval; hypothesis; probability plot