A salesperson has a 20 percent chance of making a sale to any customer who is called. If you make 6 calls, what is the probability that
A) Three calls are made
B) Probability of at least 1 sale is made.
C) Find the mean and standard deviation.
A) Three calls are made
P(x = 3) = 6C3*0.2^3*0.8^3
P(x=3) = 20*0.008*0.512 = 0.0819
B) Probability of at least 1 sale is made.
P(1<= x <=6) = 1 - P(x = 0) = 1 - 0.8^6 =1-0.2621 = 0.7379
C) Find the mean and standard deviation.
mean = np = 6*0.2 = 1.2
stdev = sqrt(npq) = sqrt(1.2*0.8) = 0.979
A salesperson has a 20 percent chance of making a sale to any customer who is...
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