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QUESTION
Psychomotor retardation scores for a large group of manic-depressive patients were approximately normal, with a mean of 930 and a standard deviation...
Psychomotor retardation scores for a large group of manic-depressive patients were approximately normal, with a mean of 930 and a standard deviation of 130. What fraction of the patients scored: a) between 800 and 1,100? b) less than 800? c) greater than 1,200?
