A Study Was Designed to Investigate the Effects of Two

Multiple Choice

A study was designed to investigate the effects of two variables - (1) a student's level of mathematical anxiety and (2) teaching method - on a student's achievement in a mathematics course. Students who had a low level of mathematical anxiety were taught using the traditional expository method. These students obtained a mean score of 290 with a standard deviation of 40 on a standardized test. Assuming a bell-shaped distribution, what percentage of scores exceeded 210?

A) approximately 95%
B) approximately 97.5%
C) approximately 2.5%
D) approximately 84%