Posted by Lynne on .
Which of the studies below would be analyzed using a ttest for dependent means
a. The study of the effectiveness of a new medication given to the same subjects at two points in time
b. A study comparing men and women on a test of motor function
c. A study comparing the mean of a sample of students on a test of motor function to a known population mean and variance
d. A study examining the ideal dosage for a new medication

Statistics 
MathGuru,
Here's a hint to help you answer this question:
In a ttest for dependent means, each subject participates in two research conditions (like a 'before' condition and an 'after' condition).