When determining which characteristics are typical of a national culture, the data reflect the ______ of the group

Suppose you got 30 students in a room and measured the distance from the tops

of their heads to the ceiling. So, in a room with an 8 foot ceiling, a 6-foot male would get a "score" of 2 feet. What would the correlation be between heights as measured in the normal way - from the floor - and the scores for distance from the head to the ceiling? (a) 0 (b) high positive (c) low positive (d) high negative (e) low negative

Researchers investigating sleep ______

a. have identified a substance destroyed during sleep b. have not been able to fully explain why we sleep c. have observed a decrease in protein synthesis while we sleep d. have found a substance created only during sleep