In which of the following situations would one use an independent t test?
a. A professor wants to know if one of his two Introduction to Psychology classes scored significantly higher than the other class on the same exam.
b. A professor wants to know if there was a significant improvement in test scores from Exam 1 to Exam 2 for one of his Introduction to Psychology classes.
c. An educator wants to know if students spend more time talking on the phone than
studying during a typical day.
d. A researcher wishes to learn whether the oldest child in a family does significantly better on standardized tests than the youngest child in the family.
Question 2
Which of the following conditions will result in larger t values?
a. smaller difference between means/smaller within group variance
b. smaller difference between means/larger within group variance
c. larger difference between means/larger within group variance
d. larger difference between means/smaller within group variance
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