Regarding bell curve assumptions, which of the following is true?
A)About 95 per cent of the population will achieve an IQ test score between 70 and 130.
B)About 75 per cent of the population will achieve an IQ test score above 130.
C)About 20 per cent of the population will achieve an IQ test score below 70.
D)About 20 per cent of the population will achieve an IQ test score above 150.

Question

Quizplus · Accepted Answer

The bell curve assumption states that about 95% of the population will achieve an IQ test score between two standard deviations from the mean, which is approximately between 70 and 130. Option B is false as only about 2.5% of the population will score above 130. Option C is also false as only about 2.5% of the population will score below 70. Option D is false as only a very small percentage of the population will score above 150.

Regarding Bell Curve Assumptions, Which of the Following Is True