MATH 302 Week 3 Test.docx Mostly Tested Exam Questions With Well Detailed Answers

MATH 302 WEEK 3 KNOWLEDGE TEST Part 1 of 6 - Binomial Distribution 1.0/ 5.0 Points Question 1 of 20 1.0/ 1.0 Points An unprepared student takes a 10 question TRUE/FALSE quiz and ended up guessing on all the problems. Find σ. Round answer to 4 decimal places. Answer: 1.5811 Answer Key:1.5811 Feedback: in Excel, =SQRT(10*0.5*0.5) Question 2 of 20 0.0/ 1.0 Points It 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: Answer Key:0.8555 Feedback: P(x < 6) = P( , in Excel =BINOM.DIST(5,8,0.5,TRUE) Question 3 of 20 0.0/ 1.0 Points Suppose a random variable, x, arises from a binomial experiment. If n = 14, and p = 0.13, find the P(X = 3) using Excel. Round answer to 4 decimal places. Answer: Answer Key:0.1728 Feedback: In Excel, =BINOM.DIST(3,14,0.13,FALSE) Question 4 of 20 0.0/ 1.0 Points Approximately 8% of all people have blue eyes. A random sample of 20 people is selected, find μ. Do not round answer. Answer: Answer Key:1.6