Week 3 Knowledge Check Homework Practice Questions
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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 r
...
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 100000770861734 from CourseHero.com on 08-25-2021 08:45:40 GMT -05:00
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2/25/2020 APUS CLE : MATH302 B007 Win 20 : Tests & Quizzes
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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 1,054 273 54 137 1,518
Ty Cobb 3,603 174 295 114 4,189 This study source was downloaded by 100000770861734 from CourseHero.com on 08-25-2021 08:45:40 GMT -05:00
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