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 48 and a standard deviation of 8. Using the 68-95-99.7 rule, what is the approximate percentage of lightbulb replacement requests numbering between 24 and 48?

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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 48 and a standard deviation of 8. Using the 68-95-99.7 rule, what is the approximate percentage of lightbulb replacement requests numbering between 24 and 48?

Expert Solution
Step 1

We have given information,

Let X be the number of daily requests to replace fluorescent lightbulbs.

μ=48

σ=8

The distribution of the number of daily requests is bell-shaped.

i.e. X~Nμ=48, σ2=64

 

 

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