//Example 2.7.1.d://standard deviation
clc;
clear;
format('v',5)
q=[49.7,50.1,50.2,49.6,49.7];//
AM= mean(q);//arithematic mean in mm
for i= 1:5
    qb(i)= q(i)-AM;
end
Q= [qb(1),qb(2),qb(3),qb(4),qb(5)];//
SD=stdev(Q);//standard deviation
disp(SD,"standard deviation is")