Economy, asked by sangpthdr6479, 6 days ago

Student "t" test is applied:-

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Answered by AmAnushka

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Student's t-test, in statistics, a method of testing hypotheses about the mean of a small sample drawn from a normally distributed population when the population standard deviation is unknown. ... In practice, for tests involving the mean of a sample of size greater than 30, the normal distribution is usually applied.

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