The t-test determines whether the means of two groups are statistically different. The independent (two-sample) t-test compares two separate groups; the paired t-test compares the same subjects under two conditions. Developed by William Gosset ('Student') at Guinness Brewery.
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Did You Know?
William Gosset published the t-test in 1908 under the pseudonym 'Student' because Guinness employees were forbidden from publishing — they feared revealing trade secrets.
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