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
Error-checking for integers: illustrations of running this script as shown below: >> readoneint Enter an integer: 9.5 Invalid! Enter an integer: 3.6 Invalid

Common form of the switch statement: The common form of the switch statement is as shown below:   switch switch_expression   case caseexp1    action1   case cas

Illustration of Spreadsheet Files: This reads the numbers in a double vector variable nums and the text in a cell array txt (the xlsread function forever returns the numbers f

This project requires you to use the ideas of Chapter 25 regarding maximization of a function. Here we assume that evolution has acted to generate highly efficient foragers. By hig

Pie chart - plot functions: The MATLAB also has a function pie which will generate a pie chart. Calling the function with the form pie (vec) draws a pie chart, by using the pe

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

Customizing Plots : There are numerous ways to customize figures in the Figure Window. On clicking the Plot Tools icon will bring up the Property Editor & Plot Browser, with ma

bar and barh functions: For a matrix, the bar and barh functions will group altogether the values in each and every row. The illustration is as shown: rm = randint(2,4,[1

Symbolic Expression The solve function solves an equation and returns the solution(s) as symbolic expressions. The answer can be converted to numbers by using any numeric funct

Illustration of Variance For illustration, for the vector [4, 6, 1, 5], there are n = 4 values therefore n - 1 is 3. The mean of this data set is also 4. The variance will be