A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 70 thousand miles and a standard deviation of 12 thousand miles. Complete parts (a) through (d) below. a. What proportion of trucks can be expected to travel between 55 and 70 thousand miles in a year? b. What percentage of trucks can be expected to travel either less than 45 or more than 90 thousand miles in a year? c. How many miles will be traveled by at least 99% of the trucks? d. What are your answers to parts (a) through (c) if the standard deviation is 9 thousand miles?
A trucking company determined that the distance traveled per truck per year is
If the standard deviation is 9 thousand miles, the proportion of trucks that can be expected to travel between 55and 70 thousand miles in a year is _____
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A trucking company determined that the distance traveled per truck per year is
c. How many miles will be traveled by at least 75% of thetrucks?
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