<PRE><B>Question 71260</B>
Question 1: Emperical Rule 
Human body temperature have a mean of 98.20 degrees a standard deviation of 0.62 degrees. 
a. Approximately what percentage of people have temperatures between 97.58 and 98.82 degrees? (Hint: Use a number line and the Emperical Rule.) 
Find the z-value of each temperature value:
(97.58-98.2)/0.62 = -1
(98.82-98.2)/0.62 = +1
According to Emperical Rule 68% of the people have temperatures in that range.
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b. Approximately what percentage of people have temperatures between 96.34 and 98.2 degrees? 
same procedure: find the z-values of the given termperatures; 
z(96.34) = (96.34-98.2)/0.62 = -3
z(98.2)= (98.2-98.2)/0.62 =0
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According to the Empirical rul 99% of the population is within 3 standard
deviations.  You have only the left half of that distribution. You answer
is 99/2 = 49.5%
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Cheers,
Stan H.


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