Question

SAT scores were originally scaled so that the scores for each section were approximately normally distributed with a mean of 500 and a standard deviation of 100. Use the empirical rule to estimate the probability that a randomly-selected student gets a section score between 400 and 700.

a. 68%
b. 95%
c. 81.5%
d. 13.5%

Answer 1

The answer is C
Step-by-step explanation:

The area under a normal curve from one standard deviation below the mean to two standard deviations above is about 0.815. The calculator gives 0.8186.