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7. If teacher's effectiveness scores are normally distributed with a mean of 0 and a standard deviation of 5, what percent of teachers has scores
7. If teacher's effectiveness scores are normally distributed with a mean of 0 and a standard deviation of 5, what percent of teachers has scores that are:
(a) greater than -10?
(b) smaller than -5?
(c) between -10 and 10?
Be sure to provide your justification.
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