If sphericity is not assumed, what needs to be adjusted to account for the violation and what impact does it have on the F-ratio?
A. The degrees of freedom need to be adjusted, which makes the F-ratio more conservative to protect against Type I error
B. The degrees of freedom need to be adjusted, which makes the F-ratio more liberal to protect against Type II error
C. The mean sum of squares needs to be adjusted, which makes the F-ratio more conservative to protect against Type I error
D. The mean sum of squares needs to be adjusted, which makes the F-ratio more liberal to protect against Type II error
Answer: A
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