Suppose you examine an ultrasound image of a fetus, who is sucking her left thumb. Generalizing from research presented in the text, what is the probability that this fetus will be left-handed at age 15?

When travelling in Europe or Africa, many native born Americans are surprised to discover that sinks there have hot water faucets on the right side and cold water on the left. In the USA, it is the opposite; hot water is dispensed from the left tap,and cold water is dispensed on the right. For some Americans, this discovery is disturbing because from their cultural upbringing they "know" that hot water should be dispensed from the left and cold water on the right. The way that they "know" this is characteristic of which way of knowing?

a. traditional b. empirical c. intuition d. rational

Which of the following diseases or health problems is more common among African Americans than among non-Hispanic whites?

a. osteoporosis b. anorexia c. AIDS d. high blood pressure