The Mean Weight of Trucks Traveling on a Particular Section

The mean weight of trucks traveling on a particular section of Highway 401 is not known. A
Provincial highway inspector needs an estimate of the mean. He selects a random sample of 49
Trucks passing the weighing station and finds the mean is 15.8 tons, with a standard deviation of the
Sample of 3.8 tons. What is the 95 percent interval for the population mean?

A) 14.7 and 16.9
B) 13.2 and 17.6
C) 10.0 and 20.0
D) 16.1 and 18.1