<PRE><B>Question 923592</B>
how long does it take to commute from work to home. it depends on several factors, including route, traffic, and departure. the data below are results (in minutes) from a random sample of eight trips. use the data to create a 95% confidence interval for the population mean time of the commute. 
27, 38, 30, 42, 24, 37, 30, 39
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I used my TI-84 to get the following::
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x-bar = 33.38
sample standard deviation:: s/sqrt(8) = 6.46
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95% CI:: 33.38 - 1.96*6.46 &lt; u &lt; 33.38+1.96*6.46
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Cheers,
Stan H.
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