The mean score of a placement exam for entrance into a math class is 80, with a standard deviation of 10. Use the empirical rule to find the percentage of scores that lie between 60 and 80. (Assume the data set has a bell-shaped distribution.) O A. 95% OB. 34% O C. 68% O D. 47.5% (...)

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The mean score of a placement exam for entrance into a math class is 80, with a standard deviation of 10. Use the empirical rule to find the percentage of scores that
lie between 60 and 80. (Assume the data set has a bell-shaped distribution.)
A. 95%
B. 34%
C. 68%
O D. 47.5%
Transcribed Image Text:The mean score of a placement exam for entrance into a math class is 80, with a standard deviation of 10. Use the empirical rule to find the percentage of scores that lie between 60 and 80. (Assume the data set has a bell-shaped distribution.) A. 95% B. 34% C. 68% O D. 47.5%
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