Which of the following is the BEST Apgar score?

Maurice has suffered a series of small strokes, each of which has caused a small amount of damage to his brain. As a result, he has now been diagnosed with ____ dementia

a. vascular b. ischemic c. functional d. myocardial

Suppose that we take 15 gay couples and observe the difference within couples in terms of age. Then we take 15 straight couples are record the same differences. We want to test if straight couples are more similar in age than gay couples. (There is some reason to expect that this is true.) What statistical procedure would be most appropriate?

a. computing a correlation coefficient for each couple b. running an independent samples t test between gays and straights c. running a t test for related samples d. using a chi-square test