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//Example 1.6
clc;
d_dev=[];
Xn=[49.7,50.1,50.2,49.6,49.7]; //Given Data
X=mean(Xn); //Mean
for i=1:5
d=Xn(1,i)-X;
d_dev=[d_dev,d^2];
end
sq_sum=sum(d_dev);
var=sq_sum/4;
//For small no of data(n<30) we use n-1 as the
//denominator so as to obtain a more accurate value
//for Standard deviation
Std_dev=sqrt(var); //Std deviation
disp(Std_dev,'Standard deviation')
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