company determined that the distance traveled per truck per year is normally distributed, with a mean of 40 thousand miles and a standard deviation thousand miles. Complete parts (a) through (d) below. a. What proportion of trucks can be expected to travel between 23 and 40 thousand miles in a year? The proportion of trucks that can be expected to travel between 23 and 40 thousand miles in a year is (Round to four decimal places as needed.) b. What percentage of trucks can be expected to travel either less than 25 or more than 60 thousand miles in a year? The percentage of trucks that can be expected to travel either less than 25 or more than 60 thousand miles in a year is %. (Round to two decimal places as needed.) c. How many miles will be traveled by at least 60% of the trucks? The number of miles that will be traveled by at least 60% of the trucks is (Round to the nearest mile as needed.) miles. d. What are your answers to parts (a) through (c) if the standard deviation is 8 thousand miles? If the standard deviation is 8 thousand miles, the proportion of trucks that can be expected to travel between 23 and 40 thousand miles in a year is (Round to four decimal places as needed.) If the standard deviation is 8 thousand miles, the percentage of trucks that can be expected to travel either less than 25 or more than 60 thousand miles in a year is %
company determined that the distance traveled per truck per year is normally distributed, with a mean of 40 thousand miles and a standard deviation thousand miles. Complete parts (a) through (d) below. a. What proportion of trucks can be expected to travel between 23 and 40 thousand miles in a year? The proportion of trucks that can be expected to travel between 23 and 40 thousand miles in a year is (Round to four decimal places as needed.) b. What percentage of trucks can be expected to travel either less than 25 or more than 60 thousand miles in a year? The percentage of trucks that can be expected to travel either less than 25 or more than 60 thousand miles in a year is %. (Round to two decimal places as needed.) c. How many miles will be traveled by at least 60% of the trucks? The number of miles that will be traveled by at least 60% of the trucks is (Round to the nearest mile as needed.) miles. d. What are your answers to parts (a) through (c) if the standard deviation is 8 thousand miles? If the standard deviation is 8 thousand miles, the proportion of trucks that can be expected to travel between 23 and 40 thousand miles in a year is (Round to four decimal places as needed.) If the standard deviation is 8 thousand miles, the percentage of trucks that can be expected to travel either less than 25 or more than 60 thousand miles in a year is %
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 40 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 23 and 40 thousand miles in a year?
The proportion of trucks that can be expected to travel between 23 and 40 thousand miles in a year is
(Round to four decimal places as needed.)
b. What percentage of trucks can be expected to travel either less than 25 or more than 60 thousand miles in a year?
The percentage of trucks that can be expected to travel either less than 25 or more than 60 thousand miles in a year is %.
(Round to two decimal places as needed.)
c. How many miles will be traveled by at least 60% of the trucks?
The number of miles that will be traveled by at least 60% of the trucks is
(Round to the nearest mile as needed.)
miles.
d. What are your answers to parts (a) through (c) if the standard deviation is 8 thousand miles?
If the standard deviation is 8 thousand miles, the proportion of trucks that can be expected to travel between 23 and 40 thousand miles in a year is.
(Round to four decimal places as needed.)
If the standard deviation is 8 thousand miles, the percentage of trucks that can be expected to travel either less than 25 or more than 60 thousand miles in a year is
(Round to two decimal places as needed.)
If the standard deviation is 8 thousand miles, the number of miles that will be traveled by at least 60% of the trucks is miles.
(Round to the nearest mile as needed.)
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