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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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General Instruction: Write your answer in a one-whole-sheet yellow paper. You may use more than one sheet if necessary. After answering, take a photo of the paper and attach them in one document so you will be submitting only one document. Please pay attention to the point allotment as well for you to be guided with the point system.

Compute the weighted mean of Ella’s grade. Refer to the table below.

Subject	Grade (X)	Weight(W)	XW
GE 1	2.0	3.0
GE 2	2.4	6.0
GE 3	2.2	3.0
GE 4	3.8	3.0

Point allotment:

summation of weight
summation of the product of the grade and weight
weighted mean

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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