initial commit / add all books

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+// Exa 2.22

+format('v',7);clc;clear;close;

+// Given data

+x= [41.7 42.0 41.8 42.0 42.1 41.9 42.0 41.9 42.5 41.8];// measured value

+n = 10;// number of reading

+sigma_x= 0;// initialization of variable

+for i=1:1:n

+    sigma_x= sigma_x+x(i);// sum of reading

+end

+x_bar=sigma_x/n;// mean

+disp(x_bar,"The mean is");

+sigma_d_sq=0;

+for i=1:1:n

+    d(i)=x(i)-x_bar

+    sigma_d_sq= sigma_d_sq+d(i)*d(i);

+end

+sigma = sqrt( sigma_d_sq/(n-1) );//standard deviation in V

+disp(sigma,"The standard deviation in V is");

+ProError= 0.6745*sigma;//probable error of one reading in V

+disp(ProError,"The probable error of one reading in V is : ")

+ProError = 0.6745*sigma;// in V

+e_m = ProError/( sqrt(n-1) );// probable error of mean

+disp(e_m,"The probable error of mean is : ");

+sorted_x= gsort(x);

+Range= sorted_x(1)-sorted_x(n);// range

+disp("Range = "+string(sorted_x(n))+" to "+string(sorted_x(1))+" = "+string(Range))