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 390 with a standard deviation of 30 on a standardized test. Assuming a non-mound-shaped distribution, what percentage of the students scored over 480?
A) at most 11%
B) at least 89%
C) approximately 2.5%
D) at most 5.5%
Correct Answer:
Verified
Correct Answer:
Verified
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