Your screen should look like this: You are asked to find how many miles will be traveled by at least 80% of the trucks, so you are looking for the instances that fall AT OR ABOV 80%, which is the top 20%. The answer is
39,900 miles
, as shown below.
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?
Question: 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 12 thousand miles. How many miles will be traveled by at least 85% of the trucks? (The correct answer is
47,563 miles
.)
What percentage of trucks can be expected to travel either less than 30 or more than 65 thousand miles in a year?
The percentage of trucks that can be expected to travel either less than 30 or more than 65 thousand miles in a year is
8.96 %
. (Round to two decimal places as needed.)
What percentage of trucks can be expected to travel either less than 20 or more than 50 thousand miles in a year?
The percentage of trucks that can be expected to travel either less than 20 or more than 50 thousand miles in a year is
22 %
. (Round to two decimal places as needed.)
What proportion of trucks can be expected to travel between 66 and 80 thousand miles in a year?
Complete parts (a) through (c) below. a. What proportion of trucks can be expected to travel between 66 and 80 thousand miles in a year? The proportion of trucks that can be expected to travel between 66 and 80 thousand miles in a year is
0.4192 Round to four
decimal places as needed.)
What percentage of trucks can be expected to travel either less than 15 or more than 50 thousand miles in a year?
The percentage of trucks that can be expected to travel either less than 15 or more than 50 thousand miles in a year is
12.09%
.
