Suppose That the Population of the Scores of All High

Multiple Choice

Suppose that the population of the scores of all high school seniors who took the SAT Math (SAT-M) test this year follows a Normal distribution with standard deviation  = 100.You read a report that says,"On the basis of a simple random sample of 100 high school seniors that took the SAT-M test this year,a confidence interval for  is found to be 512.00 ± 25.76." What was the confidence level used to calculate this confidence interval?

A) 90%
B) 95%
C) 99%
D) 99.9%