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Test for the equality of two population means

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To test for the equality of two population means at the 5% level, independent samples gave the following summary measures:

Sample 1 : n = 21, mean = 10, sd = 4

Sample 2 : n = 21, mean = 12, sd = 6

The degree of freedom of the test statistics would be ___ .

Reference no: EM132167141

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