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A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 80 thousand miles and a standard...
A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 80 thousand miles and a standard deviation of 12 thousand miles. Complete parts (a) through (c) below.
What proportion of trucks can be expected to travel between 65 and 80 thousand miles in a year? Round to four decimal places as needed
What percentage of trucks can be expected to travel either less than 70 or more than 95 thousand miles in a year? (Round to two decimal places as needed.)
How many miles will be traveled by at least 85 % of the trucks? Round to the nearest mile as needed.)
