The following table shows the wages distribution of 500 workers of a big manufacturingcompany.Weekly wages (RM)Number of workers50 - 592060 - 696070 - 7910080 - 89 15090 - 9975100 - 10950110 - 11925120 - 12920(i) Find the mean, median and inter-quartile range for the above data. (ii) Illustrate the above data by using histogram.

Mean: For a set of n observations, x1, x2, ... , xn with frequencies f1, f2, … , fn, mean is given…

Answered: The following table shows the wages…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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The following table shows the wages distribution of 500 workers of a big manufacturing
company.

Weekly wages (RM)	Number of workers
50 - 59	20
60 - 69	60
70 - 79	100
80 - 89	150
90 - 99	75
100 - 109	50
110 - 119	25
120 - 129	20

(i) Find the mean, median and inter-quartile range for the above data.
(ii) Illustrate the above data by using histogram.

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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