Multiple Choice
Use the Empirical Rule to Describe Data That Are Bell Shaped
-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 490 with a standard deviation of 20 on a standardized test. Assuming a bell-shaped distribution, where would approximately of the students score?
A) between 470 and 510
B) between 450 and 530
C) below 450 or above 530
D) below 470 or above 510
Correct Answer:
Verified
Correct Answer:
Verified
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