Which of the followings can increase the value of t? (select all the apply) a. Increase the standar

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Which of the followings can increase the value of t? (select all the apply)
a. Increase the standard deviation of difference scores
b. Decrease the standard deviation of difference scores
c. Increase the difference between means
d. Decrease the difference between means

b. Decrease the standard deviation of difference scores
c. Increase the difference between means

Increase numerator or decrease denominator of the t-value formula