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doggerfresh doggerfresh
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When you are testing whether two population means of two normally distributed populations differ and the population variances are both unknown but unequal, thetest statistics will usually have a non-integer number of degrees of freedomv. In this case, you should:


round down to the previous integer.



round up to the next integer.



assume that the population variances are equal and usev=n1+n2– 2.



change the sample sizes until the number of degrees of freedom is an integer.

Textbook 
Introductory Statistics: A Problem-Solving Approach

Introductory Statistics: A Problem-Solving Approach


Edition: 3rd
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astroasisastroasis
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Helped a lot
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This helped my grade so much Perfect
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this is exactly what I needed
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