What percentage of the population falls between 1 standard deviation below and 1 standard deviation above the mean in IQ?
A) 34
B) 50
C) 68
D) 95
Question 2
The average score on the Stanford-Binet IQ test is __________ and the standard deviation is __________.
A) 50; 5
B) 50; 10
C) 100; 15
D) 100; 20