Illustration of standard deviation, MATLAB in Mathematics

Illustration of Standard Deviation

The less spread out the numbers are, therefore smaller the standard deviation will be, as it is a way of determining the spread of the data. Similarly, the more spread out the numbers are, the bigger the standard deviation will be. For illustration here are two data sets which have similar number of values and also the similar mean, but the standard deviations are quite dissimilar:

>> x1 = [9 10 9.4 9.6];

>> mean(x1)

ans =

    9.5000

>> std(x1)

ans =

    0.4163

>> x2 = [2 17 -1.5 20.5];

>> mean(x2)

ans =

    9.5000

>> std(x2)

ans =

    10.8704

Posted Date: 10/22/2012 7:02:04 AM | Location : United States







Related Discussions:- Illustration of standard deviation, Assignment Help, Ask Question on Illustration of standard deviation, Get Answer, Expert's Help, Illustration of standard deviation Discussions

Write discussion on Illustration of standard deviation
Your posts are moderated
Related Questions
how can reconstruct just part of an image using imreconstruct?

Strings as matrix: The matrix can be generated, that consists of strings in each row. Therefore, essentially it is created as a column vector of strings, but the final result

Fliplr function: The fliplr function "flips" the matrix from left to right (in another words the left-most column, the first column, become the last column and so on), and the

Example of Minimum and Maximum Value For matrices, the functions min and max operate column wise by the default: >> mat = randint(2,4,[1 20]) mat =    9   10   1

Write a MATLAB function [d1, u1, l1, c1, r1] = NaiveGaussArrow(d, u, l, c, r) that takes as input the 5 vectors de ned above representing A. This function performs Naive Gauss redu

User-defined functions: Therefore, although many functions compute and return values, some do not. A few functions rather merely accomplish a task. Regardless of what type of

Nested IF-ELSE statements: The if-else statement is used to select between the two statements. In order to select from more than two statements, the if-else statements can als

Built-in function for Differentiation: The MATLAB has a built-in function, diff that returns the differences between consecutive elements in a vector. For illustration, >>

Find Minimum and Maximum for each row To find the maximum (or minimum) for each row, the dimension of 2 (that is how a MATLAB refers to rows) can be identified as the third arg

Use of string variables: The Characters involve letters of the alphabet, punctuation marks, digits, white space, and control characters. The Control characters are characters