Answer Happy

Given the following discrete uniform probability distribution, find the expected value and standard deviation of the random variable. Round your final answer to three decimal places, if necessary. Probability Distribution X P(X :X) II 0 - 100 8 1 - 100 2 - 100 8 3 1 8 4 - 00 8 5 -|∞0 8 (A) Expected value = 3.5; Standard Deviation = 2.291 (B) Expected value = 3.6; Standard Deviation = 2.291 (c) Expected value = 3.5; Standard Deviation = 2.296 Expected value = 3.6; Standard Deviation = 2.296 6 - 100 7 - 100
Bobbi has just put a down payment on a lot in a small subdivision. There are 8 lots in the subdivision, and all are approximately 0.25 acres in size. Four builders have been contracted by the subdivision manager to each build two homes in order to finish the subdivision in 6 months. Bobbi's uncle is one of the builders contracted by the subdivision manager. What is the probability that Bobbi's uncle will be the builder that builds her house? Round your answer to two decimal places, if necessary. A) 0.25 B) 0.30 C) 0.50 D 0.27