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MATH 302 Week 3 Quiz (ALL ANSWERSA RE CORRECT)

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MATH 302 Week 3 Quiz (ALL ANSWERSA RE CORRECT) If random variable X has a binomial distribution with n =10 and P(success) =p =0.2, find the probability that X is less than 6. (That is, find P(X<6) A ... nswer: (round to 4 decimal places) Answer Key:0.9936|.9936 P(x < 6) = P(x is less than or equal to 5), in Excel =BINOM.DIST(5,10,0.2,TRUE) Approximately 8% of all people have blue eyes. Out of a random sample of 20 people, what is the probability that at most 2 of them have blue eyes? Round answer to 4 decimal places. Answer Key:0.7879|.7879 P(x is less than or equal to 2), in Excel =BINOM.DIST(2,20,0.08,TRUE) Suppose a random variable, x, arises from a binomial experiment. If n = 14, and p = 0.13, find the standard deviation. Round answer to 4 decimal places. Answer Key:1.2583 =SQRT(14*0.13*0.87), in Excel Approximately 10% of all people are left-handed. If 200 people are randomly selected, what is the expected number of left-handed people? Round to the whole number. Do not use decimals. 200 * 0.10 = 20 If random variable X has a binomial distribution with n=15 and P(success) =p= 0.6, find the mean of X. That is, find E(X). Round to the whole number. Do not use decimals. Answer: 9 Answer Key:9 15 * 0.6 = 9 The table shows a random sample of musicians and how they learned to play their instruments. Gender|Self-Taught|Studied in School|Private Instruction|Total| Female| 12 | 38 | 22 | 72 | [Show More]

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