SAT, 11.10.2020 14:01 YOURKINGNESS7689

Students obtained a mean score of 380 with a standard deviation of 20 on a standardized test. Assuming a bell-shaped distribution, find an interval about the mean that contains approximately 95.5% of the
students score and use it to determine whether a score of 415 is unusual?

Answers: 1

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Students obtained a mean score of 380 with a standard deviation of 20 on a standardized test. Assuming a bell-shaped distribution, find an interval about the mean that contains approximately 95.5% of the students score and use it to determine whether a score of 415 is unusual?

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Students obtained a mean score of 380 with a standard deviation of 20 on a standardized test. Assuming a bell-shaped distribution, find an interval about the mean that contains approximately 95.5% of the
students score and use it to determine whether a score of 415 is unusual?