MATH302 Week Test 3 question and answers

Part 1 of 6 - Binomial Distribution 4.0/ 5.0 Points Question 1 of 201.0/ 1.0 Points A coin is flipped 30 times. What is the probability of getting 15 or more heads? Round answer to 4 decimal places. Answer: 0.5722 Answer Key:0.5722|.5722 Feedback: P(x f$displaystyle geq 15)f$ = 1 - P(x f$displaystyle leq 14)f$ in Excel =1-BINOM.DIST(14,30,0.5,TRUE) Question 2 of 200.0/ 1.0 Points Approximately 10% of all people are left-handed. Out of a random sample of 15 people, what is the probability that 4 of them are left-handed? Round answer to 4 decimal places. Answer: 0.1875 Answer Key:0.0428|.0428 Feedback: P(x = 4), In Excel, =BINOM.DIST(4,15,0.1,FALSE) Question 3 of 201.0/ 1.0 Points Suppose 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 Answer Key:0.9995|.9995 Feedback: P(x f$displaystyle geq 15)f$ = 1 - P(x f$displaystyle leq 14)f$ , in Excel Question 4 of 201.0/ 1.0 Points Approximately 8% of all people have blue eyes. A random sample of 20 people is selected, find μ. Round to one decimal place. Answer: 1.6 Answer Key:1.6 Feedback: 20*.08 Question 5 of 201.0/ 1.0 Points If 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)) (round to 4 decimal places) Answer: 0.3633 Answer Key:0.3633|.3633 In Excel, =BINOM.DIST(3,8,0.5,TRUE) Part 2 of 6 - Contingency Tables 1.0/ 1.0 Points Part 1 of 6 - Binomial Distribution 4.0/ 5.0 Points Question 1 of 201.0/ 1.0 Points A coin is flipped 30 times. What is the probability of getting 15 or more heads? Round answer to 4 decimal places. Answer: 0.5722 Answer Key:0.5722|.5722 Feedback: P(x f$displaystyle geq 15)f$ = 1 - P(x f$displaystyle leq 14)f$ in Excel =1-BINOM.DIST(14,30,0.5,TRUE) Question 2 of 200.0/ 1.0 Points Approximately 10% of all people are left-handed. Out of a random sample of 15 people, what is the probability that 4 of them are left-handed? Round answer to 4 decimal places. Answer: 0.1875 Answer Key:0.0428|.0428 Feedback: P(x = 4), In Excel, =BINOM.DIST(4,15,0.1,FALSE) Question 3 of 201.0/ 1.0 Points Suppose 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 Answer Key:0.9995|.9995 Feedback: P(x f$displaystyle geq 15)f$ = 1 - P(x f$displaystyle leq 14)f$ , in Excel Question 4 of 201.0/ 1.0 Points Approximately 8% of all people have blue eyes. A random sample of 20 people is selected, find μ. Round to one decimal place. Answer: 1.6 Answer Key:1.6 Feedback: 20*.08 Question 5 of 201.0/ 1.0 Points If 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)) (round to 4 decimal places) Answer: 0.3633 Answer Key:0.3633|.3633 In Excel, =BINOM.DIST(3,8,0.5,TRUE) Part 2 of 6 - Contingency Tables 1.0/ 1.0 Points....................................................................................CONTINUERD