When the standard deviations are equal but unknown a test fo

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

Solution

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

False.

Two sample t test is used.

Correct degrees of freedom = n₁+n₂-2