Joe’s 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 12 thousand miles. (A) What proportion of trucks can be expected to travel between 34 and 50 thousand miles in a year? (express your answer in percentage, 2 decimal places) Answer: % of the 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 below 30 or above 60 thousand miles in a year? (express your answer in percentage, 2 decimal places) Answer: % of the trucks can be expected to travel below 30 or above 60 thousand miles in a year (C) How many miles will be traveled by at least 80% of the trucks? (express your answer in percentage, 2 decimal places) Answer: thousand miles in a year.
Joe’s Trucking Company determined that the distance traveled per truck per year is
(A) What proportion of trucks can be expected to travel between 34 and 50 thousand miles in a year? (express your answer in percentage, 2 decimal places)
Answer: % of the 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 below 30 or above 60 thousand miles in a year? (express your answer in percentage, 2 decimal places)
Answer: % of the trucks can be expected to travel below 30 or above 60 thousand miles in a year
(C) How many miles will be traveled by at least 80% of the trucks? (express your answer in percentage, 2 decimal places)
Answer: thousand miles in a year.
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