Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower on the test?

The percentage of people who report the use of any illicit drug in the past month is highest among the 16- to 17-year-old age group

Indicate whether the statement is true or false

Emergency contraception works primarily by causing an abortion

a. True b. False