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Thread Subject:
Probability question?

Subject: Probability question?

From: jinniwinni

Date: 28 Sep, 2012 04:58:07

Message: 1 of 1

Write a program that tosses a (fair) coin n times and records whether or not the proportion of heads is between 0.4 and 0.6 after each set of n tosses. Repeat this experiment 2000 times. About how large must n be so that the proportion of heads is between 0.4 and 0.6 about 95% of the time?

How would you do this question? Here is the code :

function percentage = coinTosses(run_time, n)
flips = zeros(1,n);
for i=1:n
    flips(i) = randi(2) - 1;
number_of_heads = sum(flips);
proportion_of_heads = number_of_heads/n;

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