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1. The following distribution is not a probability distribution because X 2 3 0 1 3 P(X) 0.- 20 0.27 0.15 0.47 0.31 A) values of the variable are negative. C) the probability values do not add to 1. B) a probability is negative. D) the probability values are not discrete. Note: Properties of Probability Distribution The sum of all probabilities = 1 0<P(x) < 1 (A probability must be less than one and ne negative) 2. Find the mean and the standard deviation of the distribution shown below. X 2 3 4 P(X) 0.38 0.44 0.18 3. Find the mean and the standard deviation for the values of n and p when the conditions for the binomial distribution are met: n = 700, p = 0.25 4. A coin is tossed 8 times. What is the probability of getting exactly 4 heads?

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1. b.probability is negative...

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