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Business, 04.04.2021 01:30 Ezekielcassese

A trucking company determined that the distance traveled per truck per year is normally​ distributed, with a mean of thousand miles and a standard deviation of thousand miles. Complete parts​ (a) through​ (d) below. a. What proportion of trucks can be expected to travel between and thousand miles in a​ year?
The proportion of trucks that can be expected to travel between and thousand miles in a year is
0.5000.
​(Round to four decimal places as​ needed.)
b. What percentage of trucks can be expected to travel either less than or more than thousand miles in a​ year?
The percentage of trucks that can be expected to travel either less than or more than thousand miles in a year is
34.89​%.
​(Round to two decimal places as​ needed.)
c. How many miles will be traveled by at least ​% of the​ trucks?
The number of miles that will be traveled by at least ​% of the trucks is
nothing miles.
​(Round to the nearest mile as​ needed.)
d. What are your answers to parts​ (a) through​ (c) if the standard deviation is thousand​ miles?
If the standard deviation is thousand​ miles, the proportion of trucks that can be expected to travel between and thousand miles in a year is
nothing.
​(Round to four decimal places as​ needed.)
If the standard deviation is thousand​ miles, the percentage of trucks that can be expected to travel either less than or more than thousand miles in a year is
nothing​%.
​(Round to two decimal places as​ needed.)
If the standard deviation is thousand​ miles, the number of miles that will be traveled by at least ​% of the trucks is
nothing miles.
​(Round to the nearest mile as​ needed.)

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