Asked Nov 13, 2019

A random experiment consists of throwing 4 equal coins, if X is the number of stamps:
a. What is the dispersion of X?


Expert Answer

Step 1


Hi, thank you for this question. We have considered number of stamps as the number of tails (or heads).

Step 2

Binomial distribution:

The binomial distribution gives the probability of number of successes out of n trials in a series of Bernoulli trials.


x0,1,.,0 p<l;q=1-p
P(X x)

Image Transcriptionclose

п x0,1,.,0 p<l;q=1-p P(X x) otherwise SD(Xnp


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