# week 3 test.docx - Part 1 of 6 Binomial Distribution 2.0...

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Part 1 of 6 - Binomial Distribution2.0/ 5.0 PointsQuestion 1 of 200.0/ 1.0 PointsIt is known that 50% of adult workers have a high school diploma. If a random sample of 8 adult workers is selected, what is the probability that less than 6 of them have a high school diploma? (That is, what is P(X<6) (keep 4 decimal places) Answer: 0.0352
Question 2 of 201.0/ 1.0 PointsSuppose a random variable, x, arises from a binomial experiment. If n = 25, and p = 0.85, find the P(X ≥ 15) using Excel. Round answer to 4 decimal places. Answer: 0.9995
Question 3 of 200.0/ 1.0 PointsIt is known that 20% of adult workers have a high school diploma. If a random sample of 10 adult workers is selected, what is the probability that 5 or more of them have a high school diploma? (That is, find P(X≥5) (keep 4 decimal places) Answer: 0.9736
Question 4 of 201.0/ 1.0 PointsIf random variable X has a binomial distribution with n =8 and P(success) = p =0.5, find the probability that X is at most 3. (That is, find P(X ≤ 3)) (keep 4 decimal places) Answer: 0.3633
Question 5 of 200.0/ 1.0 PointsIf random variable X has a binomial distribution with n=9 and P(success) =p= 0.4, find the standard deviation of X. (keep 4 decimal places) Answer:
Part 2 of 6 - Contingency Tables1.0/ 1.0 Points
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