Transcription of Chapter 206 Two-Sample T-Test
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Chapter 206 Two-Sample T-Test
NCSS Statistical Software 206-1 NCSS, LLC. All Rights Reserved. Chapter 206 Two-Sample T-Test Introduction This procedure provides several reports for the comparison of two continuous-data distributions, including confidence intervals for the difference in means, Two-Sample t-tests, the z-test, the randomization test, the Mann-Whitney U (or Wilcoxon Rank-Sum) nonparametric test, and the Kolmogorov-Smirnov test. Tests of assumptions and plots are also available in this procedure. The data for this procedure can be contained in two variables (columns) or in one variable indexed by a second (grouping) variable.
Fertilizer Yield B 546 B 547 B 774 B 465 B 459 B 665 B 456 . . . . A 452 A 874 A 554 A 447 A 356 A 754 A 558 574 A 664 . . . . Data Structure The data may be entered in two formats, as shown in the two examples below. The examples give the yield of corn for two types of fertilizer.
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