<PRE><B>Question 1118453</B>
The employees of Electronics Inc. would like to have a dental plan as part of their benefits package. The question is: How much does a typical employee and his or her family spend per year on dental expenses? A sample of 46 employees reveals the mean amount spent last year was $1900, with a standard deviation of $630. 

a.	Construct a 98% confidence interval for the population mean. (Round the final answers to the nearest whole dollar. 
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sample mean:: 1900
Margin of Error:: z(s/sqrt(n)) = 2.3263(630/sqrt(46)) = 216
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98% CI:: 1900-216 &lt; u &lt; 1900+216
98% CI:: 1684 &lt; u &lt; 2116
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Cheers,
Stan H.
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