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Two Sample t-Test

The two sample t-test is a hypothesis test used to to compare the means of two reasonably small (30 or less) samples to see if it is feasible that they come from the same population. The hypothesis is:

H0 the population means are equal
H1 the popular means are different

The test is:

Step 1: calculate the pooled standard deviation: Step 2: calculate the t statistic:   sample means n1, n2 sample sizes s1, s2 sample standard deviations ν degrees of freedom Analytical and descriptive statistics are covered in the MiC Quality online course Primer in Statistics. Try out our courses by taking the first module of the Primer in Statistics free of charge. :: Six Sigma Primer :: Primer in Statistics :: Advanced Statistics :: Statistical Process Control SPC :: Advanced SPC :: Design of Experiments :: Advanced DOE :: Measurement Systems Analysis MSA/ Gage R&R Primer in Statistics FREE First Module "Introduction to Statistics" Primer in Statistics FREE Reference Booklet FREE Excel Primer 