Week 3 Knowledge Check Homework Practice Questions with solutions

Week 3 Knowledge Check Homework Practice Questions Return to Assessment List Part 1 of 6 - Binomial Distribution Knowledge Check Practice 4.0/ 5.0 Points Question 1 of 20 A coin is flipped 30 times. Find σ². Do not round answer. Answer: 7.5 Answer Key: 7.5 Feedback: 30*.5*.5 Question 2 of 20 It is known that 50% of adult workers have a high school diploma. If a random sample of 6 adult workers is selected, what is the probability that 3 or more of them have a high school diploma? (That is, find P(X 3) (keep 4 decimal places) Answer: 0.6563 Answer Key: 0.6563 Feedback: P(X 3) = 1 - P(x , in Excel =1-BINOM.DIST(2,6,0.5,TRUE) Question 3 of 20 Approximately 8% of all people have blue eyes. Out of a random sample of 20 people, what is the probability that 2 of them have blue eyes? Round answer to 4 decimal places. Answer: 0.7879 Answer Key: 0.2711 MATH302 B007 Win 20   Tests & Quizzes Tests & Quizzes This study source was downloaded by from CourseH on 08-25-2021 08:45:40 GMT -05:00 This study resource was shared via CourseH 2/25/2020 APUS CLE : MATH302 B007 Win 20 : Tests & Quizzes 1.0/ 1.0 Points 1.0/ 1.0 Points 0.0/ 1.0 Points Feedback: P(x = 2), in Excel, =BINOM.DIST(2,20,0.08,FALSE) Question 4 of 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). (Do not round answer) Answer: 9 Answer Key: 9 Feedback: 15*.6 Question 5 of 20 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) Answer: (keep 4 decimal places) 0.9936 Answer Key: 0.9936 Feedback: P(x < 6) = P(x , in Excel =BINOM.DIST(5,10,0.2,TRUE) Part 2 of 6 - Contingency Table Knowledge Check Practice 0.0/ 1.0 Points Question 6 of 20 The table of data obtained from WWW.BASEBALL-ALMANAC.COM shows hit information for four well known baseball players. Suppose that one hit from the table is randomly selected. NAME Single Double Triple Home Run TOTAL HITS Babe Ruth 1,517 506 136 714 2,873 Jackie Robinson 1,,518 Ty Cobb 3,,189 This study source was downloaded by from CourseH on 08-25-2021 08:45:40 GMT -05:00 This study resource was shared via