Question 296773
the mean weight of trucks traveling on a particular section of a highway is not known. A highway inspector needs an estimate of the mean. He selescts a random sample of 49 trucks passing the weight station and finds the mean is 15.8 tons with a sample standard deviation of 3.8 tons. in tons and rounding to the closest 0.1 ton, what is the 95 percent interval for the population mean?
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Using both the t-dist and the z-dist on a TI
caluculator I get the following:
14.7 < u < 16.9
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Cheers,
Stan H.
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14.7 and 16.9 tons
13.2 and 17.6
10.0 and 20.0 tons
16.1 and 18.1 tons