Question

A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 50 thousand miles and a standard deviation of 10 thousand miles. Complete parts (a) through (d) below. a. What proportion of trucks can be expected to travel between 37 and 50 thousand miles in a year? The proportion of trucks that can be expected to travel between 37 and 50 thousand miles in a year is 0.4032. (Round to four decimal places as needed.) b. 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 95.44%. (Round to two decimal places as needed.)

          A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 50 thousand miles and a standard deviation of 10 thousand miles. Complete parts (a) through (d) below.

a. What proportion of trucks can be expected to travel between 37 and 50 thousand miles in a year?
The proportion of trucks that can be expected to travel between 37 and 50 thousand miles in a year is 0.4032.
(Round to four decimal places as needed.)

b. 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 95.44%.
(Round to two decimal places as needed.)

A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 50 thousand miles and a standard deviation of 10 thousand miles. Complete parts (a) through (d) below.

a. What proportion of trucks can be expected to travel between 37 and 50 thousand miles in a year?
The proportion of trucks that can be expected to travel between 37 and 50 thousand miles in a year is 0.4032.
(Round to four decimal places as needed.)

b. 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 95.44%.
(Round to two decimal places as needed.)

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