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?
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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