I have data x , with nonzero mean. I can plot normal distribution with following
x=randi([1 20],1,60);a=mean(x);b=sqrt(var(x));x= [-130:1:120];norm = normpdf(x,a,b);plot(x,norm)
to calculate x value for 97%, I have to see z score for 97% and then use
z=(x-mean)/standard deviation
for calculation of x value but how can I calculate x value directly by code.
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