Using the Empirical Rule 3. 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 460 with a standard deviation of 40 on a standardized test. Assuming a bell- shaped distribution...
Using the
3. 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
score of 460 with a standard deviation of 40 on a standardized test. Assuming a bell-
shaped distribution...
a) What two scores would approximately 68% of the scores fall between? ________
b) Approximately 99.7% of the scores fall between fall between what scores? ________
Given that
These students obtained a mean
score of 460 with a standard deviation of 40 on a standardized test
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