When the standard deviations are equal but unknown, a test for the differences between two population...

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When the standard deviations are equal but unknown, a test for the differences between two population...

When the standard deviations are equal but unknown, a test for the differences between two population means has n − 1 degrees of freedom.

True or False

math Statistics-And-Probability

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Answer 1

Answer #1

False,because in case of test for differences between two population means, one sample size is n_1 and other sample size is n_2, so the degree of freedom is n_1+n_2 -2.

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Answer 2

Answer #2

If we are testing for the difference between two population means and assume that the two populations have equal but unknown standard deviations, the sample standard deviations are pooled to compute the best estimated variance.

answered by: ANWAR

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Answer 3

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