A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 70 thousand miles and a standard deviation of 12 thousand miles. Complete parts (a) through (d) below. a. What proportion of trucks can be expected to travel between 55 and 70 thousand miles in a year? b. What percentage of trucks can be expected to travel either less than 45 or more than 90 thousand miles in a year? c. How many miles will be traveled by at least 99% of the trucks? d. What are your answers to parts (a) through (c) if the standard deviation is 9 thousand miles?
A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 70 thousand miles and a standard deviation of 12 thousand miles. Complete parts (a) through (d) below. a. What proportion of trucks can be expected to travel between 55 and 70 thousand miles in a year? b. What percentage of trucks can be expected to travel either less than 45 or more than 90 thousand miles in a year? c. How many miles will be traveled by at least 99% of the trucks? d. What are your answers to parts (a) through (c) if the standard deviation is 9 thousand miles?
A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 70 thousand miles and a standard deviation of 12 thousand miles. Complete parts (a) through (d) below. a. What proportion of trucks can be expected to travel between 55 and 70 thousand miles in a year? b. What percentage of trucks can be expected to travel either less than 45 or more than 90 thousand miles in a year? c. How many miles will be traveled by at least 99% of the trucks? d. What are your answers to parts (a) through (c) if the standard deviation is 9 thousand miles?
A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 70 thousand miles and a standard deviation of 12 thousand miles. Complete parts (a) through (d) below. a. What proportion of trucks can be expected to travel between 55 and 70 thousand miles in a year? b. What percentage of trucks can be expected to travel either less than 45 or more than 90 thousand miles in a year? c. How many miles will be traveled by at least 99% of the trucks? d. What are your answers to parts (a) through (c) if the standard deviation is 9 thousand miles?
If the standard deviation is 9 thousand miles, the proportion of trucks that can be expected to travel between 55and 70 thousand miles in a year is _____
Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...
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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 11 thousand miles. Complete parts (a) through (d) below. (If you know parts a, b, c and d...please post)
c. How many miles will be traveled by at least 75% of thetrucks?
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