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The extract of a plant native to Taiwan has been tested as a possible treatment for...

The extract of a plant native to Taiwan has been tested as a possible treatment for Leukemia. One of the chemical compounds produced from the plant was analyzed for a particular collagen. The collagen amount was found to be normally distributed with a mean of 66 and standard deviation of 8.4 grams per mililiter.


(a)  What is the probability that the amount of collagen is greater than 64 grams per mililiter?


answer:


(b)  What is the probability that the amount of collagen is less than 73 grams per mililiter?


answer:


(c)  What percentage of compounds formed from the extract of this plant fall within 1standard deviations of the mean?


answer:  %


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