For the independent-measures t statistic, what is the effect of increasing the difference between sample means?
A) Increase the likelihood of rejecting H0 and increase measures of effect size.
B) Increase the likelihood of rejecting H0 and decrease measures of effect size.
C) Decrease the likelihood of rejecting H0 and increase measures of effect size.
D) Decrease the likelihood of rejecting H0 and decrease measures of effect size.
Question 2In a distribution with positive skew, scores with the highest frequencies are ____.
A) on the right side of the distribution
B) on the left side of the distribution
C) in the middle of the distribution
D) represented at two distinct peaks
Question 3For the independent-measures t statistic, what is the effect of increasing the sample variances?
A) Increase the likelihood of rejecting H0 and increase measures of effect size.
B) Increase the likelihood of rejecting H0 and decrease measures of effect size.
C) Decrease the likelihood of rejecting H0 and increase measures of effect size.
D) Decrease the likelihood of rejecting H0 and decrease measures of effect size.
Question 4The students in a psychology class seemed to think that the midterm exam was very easy. If they are correct, what is the most likely shape for the distribution of exam scores?
A) symmetrical
B) positively skewed
C) negatively skewed
D) normal
Question 5Two separate samples are being used to estimate the difference between population means for two treatment conditions. Which of the following would produce the widest confidence interval?
A) n1 =n2 = 10 with a pooled variance of 10
B) n1 =n2 = 10 with a pooled variance of 100
C) n1 =n2 = 20 with a pooled variance of 10
D) n1 =n2 = 20 with a pooled variance of 100
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