68 Marketing and Consumer Behavior Nine West sells women's flip flops in eight different colors. Despite the available selection, 50% of all flip...
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5.68 Marketing and Consumer Behavior Nine West sells
women's flip flops in eight different colors. Despite the available
selection, 50% of all flip flops purchased are white. Suppose 30
buyers are selected at random.
a. Find the mean, variance, and standard deviation of the number
of buyers who purchase white flip flops.
b. Find the probability that the number of white flip flops purchased
will be within two standard deviations of the mean. Compare this
with the predicted result from Chebyshev's Rule.
c. Suppose two groups of 30 customers are independently selected.
What is the probability of at least one group having exactly 15
people who buy white flip flops?

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