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Mathematics -- Statistics
11 - 15
Variance and Standard Deviation
This resource, created by author David M. Lane, is a general reference which helps to define and explain variance and standard deviation. The website is fairly simple, users just select the term they wish to define. The...
Scatter Plot (Engineering Statistics Handbook)
This resource, created by authors James Filliben and Alan Heckert, provides an explanation of scatter plots, their use, purpose and interpretation. It uses examples of the various relationships described by scatter...
Two-Sample t-Test for Equal Means (Engineering Statistics Handbook)
Gives textbook-like explanation with some real-life data to compute a t-test and determine if two population means are equal. Also has some links for case studies and a web-based program called Dataplot. There is a...
Research Methods Knowledge Base : The t-Test
This particular textbook lesson, presented by Cornell University's Research Methods Knowledge Base, addresses the independent t-test. It presents to the user how to compute the t statistic and then how to interpret the...
Z-test for Difference Between Means
This slide show presentation, created by William Richards of The Vancouver Network Analysis Team, provides two good examples on using the Z-test for the difference between two means. Gives some good "plain language"...
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