An estimate of the mean time taken by this group of workers is: (Using the attached)A. 51.7 min / B. 47.0 min / C. 49.7 min / D. 50.0 min The following histogram gives the times taken by a random sample of workers of a company tocomplete a specific task.Number of Workers10198765 4321010di30402050 60 70 80 90Time (min)

From the given graph the data values are Time (min) Number of workers 20-30 2 30-40 5 40-50…

Answered: The following histogram gives the times…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An estimate of the mean time taken by this group of workers is: (Using the attached)
A. 51.7 min / B. 47.0 min / C. 49.7 min / D. 50.0 min

The following histogram gives the times taken by a random sample of workers of a company to
complete a specific task.
Number of Workers
10
1987
65 432
1
0
10
di
30
40
20
50 60 70 80 90
Time (min)

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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