1. Determine P(µ - σ ≤ X ≤ µ + σ) for the probability function
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x:
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1
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2
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3
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4
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P(x):
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.2,
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.4,
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.3,
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.1
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2. The U.S. Department of Agriculture reports that 75% of people who invest in the futures market lose money. Based on the binomial probability function with n = 5, determine:
(a) The probability that all five lose money.
(b) The probability that all five make money.
(c) The probability that at least two lose money.