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 370 with a standard deviation of 50 on a standardized test. assuming a mound-shaped and symmetric distribution, in what range would approximately 95% of the students score?