Mathematics, 20.02.2020 07:05 lybrain354
A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of
60
thousand miles and a standard deviation of
10
thousand miles. Complete parts (a) through (c) below.
a. nbspa.
What proportion of trucks can be expected to travel between
47
and
60
thousand miles in a year?
The proportion of trucks that can be expected to travel between
47
and
60
thousand miles in a year is
(Round to four decimal places as needed.)
b. nbspb.
What percentage of trucks can be expected to travel either less than
47
or more than
80
thousand miles in a year?
The percentage of trucks that can be expected to travel either less than
47
or more than
80
thousand miles in a year is
(Round to two decimal places as needed.)
c. nbspc.
How many miles will be traveled by at least
99%
of the trucks?
The amount of miles that will be traveled by at least
99%
of the trucks is
miles.
(Round to the nearest mile as needed.)
Answers: 2
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