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Problem#5 SELF 6.8 Toby's Trucking Company determined that the Test distance traveled per truck per year is normally distrib. uted, with a mean of 50 thousand miles and a standard deviation of 12 thousand miles. a. What proportion of trucks can be expected to travel between 34 and 50 thousand miles in a year? b. What percentage of trucks can be expected to travel either less than 30 or more than 60 thousand miles in a year? c. How many miles will be traveled by at least 80% of the trucks? d. What are your answers to (a) through (c) if the standard devia- tion is 10 thousand miles?

Problem#5 SELF 6.8 Toby's Trucking Company determined that the Test distance traveled per truck per year is normally distrib. uted, with a mean of 50 thousand miles and a standard deviation of 12 thousand miles. a. What proportion of trucks can be expected to travel between 34 and 50 thousand miles in a year? b. What percentage of trucks can be expected to travel either less than 30 or more than 60 thousand miles in a year? c. How many miles will be traveled by at least 80% of the trucks? d. What are your answers to (a) through (c) if the standard devia- tion is 10 thousand miles?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Problem#5 SELF 6.8 Toby's Trucking Company determined that the Test distance traveled per truck per year is normally distrib- uted, with a mean of 50 thousand miles and a standard deviation of 12 thousand miles. a. What proportion of trucks can be expected to travel between 34 and 50 thousand miles in a year? b. What percentage of trucks can be expected to travel either less than 30 or more than 60 thousand miles in a year? c. How many miles will be traveled by at least 80% of the trucks? d. What are your answers to (a) through (c) if the standard devia- tion is 10 thousand miles?
Transcribed Image Text:Problem#5 SELF 6.8 Toby's Trucking Company determined that the Test distance traveled per truck per year is normally distrib- uted, with a mean of 50 thousand miles and a standard deviation of 12 thousand miles. a. What proportion of trucks can be expected to travel between 34 and 50 thousand miles in a year? b. What percentage of trucks can be expected to travel either less than 30 or more than 60 thousand miles in a year? c. How many miles will be traveled by at least 80% of the trucks? d. What are your answers to (a) through (c) if the standard devia- tion is 10 thousand miles?
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