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The experience of a certain hospital showed the the distribution of length stay of patients is normal with a mean of 11.5 days and a standard deviation of 2 days.
a. What percentage of the patients stayed nine days or less?
b.If a new method of nursing care is to be administered to the middle 96% of the group how long should a patient stay to be included in the study?

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maica

  1. aral ka

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