Please help ASAP. This is for my statistics class.
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The mean of a normal probability distribution is 60; the standard deviation is 5. (Round your answers to 2 decimal places.)
a. About what percent of the observations lie between 55 and 65?
Percentage of observations %
b. About what percent of the observations lie between 50 and 70?
Percentage of observations %
c. About what percent of the observations lie between 45 and 75?
Percentage of observations %
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