1. A Psychology instructor asked the 100 females in her class to rate their intelligence on a scale of 1 to 10. The ratings were
The variance of the intelligence scores is
A. 1.29.
B. 1.66.
C. 1.71.
2. A refrigerator contains 6 apples, 5 oranges, 10 bananas, 3 pears, 7 peaches, 11 plums, and 2 mangos. Imagine you stick your hand into the refrigerator and pull out a piece of fruit at random. What is the sample space for this process?
A. S = {apple, orange, banana, pear, peach, plum, mango}
B. S = {6, 5, 10, 3, 7, 11, 2}
C. S = {6 apples, 5 oranges, 10 bananas, 3 pears, 7 peaches, 11 plums, 2 mangos}