SOLUTION: The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-

Question 1167860: The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 49 and a standard deviation of 5. Using the 68-95-99.7 rule, what is the approximate percentage of lightbulb replacement requests numbering between 44 and 49?

Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.
The physical plant at the main campus of a large state university receives daily requests
to replace florescent lightbulbs. The distribution of the number of daily requests is bell-shaped
and has a mean of 49 and a standard deviation of 5. Using the 68-95-99.7 rule,
what is the approximate percentage of lightbulb replacement requests numbering between 44 and 49?
~~~~~~~~~~~~~~~~~~~~~~~

Notice that in this problem, 44 is 5 units, or exactly one standard deviation, below 
the mean of 49.


Therefore, the approximate percentage of lightbulb replacement requests numbering between 
44 and 49 is

     = 34%.    ANSWER

Solved.

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