![]() As the degrees-of-freedom increase, a t-distribution becomes narrower, taller, and approaches a standard normal distribution. A t-distribution is more spread out than a standard normal distribution.Ĭ is incorrect. It has increased the p-value to compensate for the fact that the test is too liberal when sphericity is violated. The correction has elicited a more accurate significance value. 009 (degrees of freedom are slightly different due to rounding). As the degrees-of-freedom increase, a t-distribution becomes wider and flat.Ī t-distribution is a symmetrical, bell-shaped distribution that looks like a normal distribution and has a mean of zero.Ī is incorrect. So our F-test result is corrected from F (2,10) 12.534, p. ![]()
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