2. Suppose a magician has a weighted coin that comes up heads 40% of the time and tails 60% of the time. He tosses the coin 5 times. Define a random variable H to be the number of heads that appear in 5 tosses. a) Find the probability mass function (pmf) f for H and write the pmf in table form. b) Find P(H > 3) c) We have learned that the expected value of a random variable can be thought of as the mean value of the variable. The mode of a probability mass function f on a sample space S is an element x E S that maximizes f. Given this definition, find the mode of f where f is the pmf ofH.

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2. Suppose a magician has a weighted coin that comes up heads 40% of the time and tails 60%
of the time. He tosses the coin 5 times. Define a random variable H to be the number of
heads that appear in 5 tosses.
a) Find the probability mass function (pmf) f for H and write the pmf in table form.
b) Find P(H > 3)
c) We have learned that the expected value of a random variable can be thought of as the
mean value of the variable. The mode of a probability mass function f on a sample space
S is an element x E S that maximizes f. Given this definition, find the mode of f where f
is the pmf of H.
Transcribed Image Text:2. Suppose a magician has a weighted coin that comes up heads 40% of the time and tails 60% of the time. He tosses the coin 5 times. Define a random variable H to be the number of heads that appear in 5 tosses. a) Find the probability mass function (pmf) f for H and write the pmf in table form. b) Find P(H > 3) c) We have learned that the expected value of a random variable can be thought of as the mean value of the variable. The mode of a probability mass function f on a sample space S is an element x E S that maximizes f. Given this definition, find the mode of f where f is the pmf of H.
Expert Solution
Step 1

Given 

P(Head) = 0.40

P(Tail) = 0.60

tosses 5 times 

H= Number of heads that appear in 5 tosses of a coin 

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