SOLUTION: The mean weight of trucks traveling on a particular section of I-475 is not known. A state highway inspector needs an estimate of the mean. He selects a random sample of 49 trucks
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Question 1076856: The mean weight of trucks traveling on a particular section of I-475 is not known. A state 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 4.2 tons. What is the probability that a truck will weigh less than 14.3 tons? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! z<(14.3-15.8)/4.2. This is (x-mean)/sd
z< -1.5/4,2
z< -.36
probability is 0.3594 for one truck to weigh fewer than 14.3 tons.
