# Measurements Properties & Issues

• ### Measurement Process Characterization (Engineering Statistics Handbook)

This chapter of the NIST Engineering Statistics handbook describes the measurement process characterization with discussions of control, calibration, gauge studies, and uncertainty analysis, and a set of case studies.
• ### Measurement Process Characterization Case Studies (Engineering Statistics Handbook)

This part of the NIST Engineering Statistics handbook contains case studies for the measurement process chapter.
• ### Case Studies in Process Monitoring (Engineering Statistics Handbook)

This part of the NIST Engineering Statistics handbook contains case studies for the process or product monitoring and control chapter.
• ### Product and Process Comparisons (Engineering Statistics Handbook)

This chapter of the NIST Engineering Statistics handbook "presents the background and specific analysis techniques needed to compare the performance of one or more processes against known standards or one another." It contains an introduction and information about comparisons with one process, two processes, and three or more processes or samples. Topics include outliers, trends, confidence intervals for means and proportions for one sample. Also included are materials on ANOVA, Kruskal Wallis tests, tests for equivalence of variances, variance components, chi-square tests for contingency tables and multiple comparisons.
• ### The Normal Distribution and Density

The user is be able to change the mean and the standard deviation using the sliders and see the density change graphically. The check buttons (68, 95, 99) will help one realize the appropriate percentages of the area under the curve. An example of thiis "68-95-99.7" rule follows.
• ### Statistics and Data Analysis

This online introductory statistics textbook covers basic descriptive, statistical, and graphical procedures for analyzing data sets and contains three data sets and a practice final exam. Chapter headings include: Descriptive Statistics, Probability, Resampling, Discrete Probability Models, Continuous Probability Models, Central Limit Theorem, Confidence Intervals, Tests of Hypotheses, Estimation of Effect: Two Independent Samples, Design of Experiments, and Regression. The relation to this site includes exercises.
• ### Analysis Tool: Sampling Distribution of Sample Means

This applet generates a graph of the sampling distribution of sample means and displays the probabilities associated with that distribution. Users enter the mean and standard deviation of the source population and the size of the samples. The applet also calculates the standard error of the sample means.

• ### Construct Validity in Psychological Tests

A paper discussing the development of construct validity as applied to psychological studies.
• ### Summarizing Data

The first chapter of an online Introduction to Biostatistics course. Two lecture notes and a set of overheads are provided. Additionally, links for additional reading and exercises with solutions are provided.
• ### Elementary Concepts in Statistics

Gives an overview of variables, classifications, measurements, relations, and other basic statistical concepts. Also contains two animated graphs.