Question

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 340 with a standard deviation of 50 on a standardized test. Assuming a bell-shaped distribution, where would approximately 95% of the students score?

a below 240 or above 440

b below 190 or above 490

c between 190 and 490

d between 240 and 440

Answer 1