An instructor in a large lecture class found, at the end of the semester, that the total point distribution in his class was approximately Normal, with a mean of 530 and a standard deviation of 80. About what percent scored between 490 and 590? 30.9% 77.3% 46.5%
Unitary Method
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Help!!
Given Data:
Let X represent the total point distribution
Mean=530
Standard deviation=80
X~ Normal (530,)
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