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MATH302 Week 8 Knowledge Check Homework Practice Questions
- Course
- MATH302
- Institution
- American Public University
MATH302 Week 8 Knowledge Check Homework Practice Questions
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: Quiz Submissions - Week 8 Knowledge Check Homework Practice Questions - MATH302 I005 Fall -APEIhttps://myclassroom.apus.edu/d2l/lms/quizzing/user/quiz_submissions_attempt.d2l?
isprv=0&qi=189606&ai=2082570&isInPopup=0&cfql=0&fromQB=… 1/14Quiz Submissions - Week 8 Knowledge Check Homework Practice Questions
Name _______ (username: ______ ) Attempt 2 Attempt Score: - 100 %
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Question 1 point
A company manager believes that a person's ability to be a leader is directly correlated to their zodiac sign. He never selects someone to chair a committee without first evaluating their zodiac sign. An irate employee sets out to prove her manager wrong. She claims that if zodiac sign truly makes a difference in leadership, then a random sample of 210 CEO's in our country would reveal a difference in zodiac sign distribution. She finds the following zodiac signs for her random sample of 210 CEO's:
Births Signs
25Aries
13Taurus
17Gemini
21Cancer
16Leo
18Virgo
15Libra
16Scorpio
20Sagittarius
11Capricorn
23Aquarius
15Pisces
Can she conclude that zodiac sign makes a difference in whether or not a person makes a good leader? Enter the p-value - round to 4 decimal places. Make sure you put the 0 in front of the decimal.
p-value = ___
___
Answer: 0.4798
Hide question 1 feedback
The Expected Count is all the same value. 210*(1/12) = 17.5
BirthsSignsExpected
Count
25Aries17.5
13Taurus17.5
17Gemini17.5
21Cancer17.5
16Leo17.5 : Quiz Submissions - Week 8 Knowledge Check Homework Practice Questions - MATH302 I005 Fall -APEI
https://myclassroom.apus.edu/d2l/lms/quizzing/user/quiz_submissions_attempt.d2l?
isprv=0&qi=189606&ai=2082570&isInPopup=0&cfql=0&fromQB=… 2/1418Virgo17.5
15Libra17.5
16Scorpio17.5
20Sagittariu
s17.5
11Capricor
n17.5
23Aquarius17.5
15Pisces17.5
Use Excel to find the p-value
=CHISQ.TEST(Highlight Observed, Highlight Expected)
Question 2 point
An urban economist is curious if the distribution in where Oregon residents live is different today than it was in
1990. She observes that today there are approximately 3,109 thousand residents in NW Oregon, 902 thousand residents in SW Oregon, 244 thousand in Central Oregon, and 102 thousand in Eastern Oregon. She knows that in 1990 the breakdown was as follows: 72.7% NW Oregon, 20.7% SW Oregon, 4.8% Central Oregon, and 2.8% Eastern Oregon.
Can she conclude that the distribution in residence is different today at a 0.05 level of significance?
Enter the test statistic - round to 4 decimal places. Test statistic=___
___
Answer: 10.1714
Hide question 2 feedback
NW
OregonSW OregonCentral
OregonEastern
Oregon
Observe
d
Counts3109902244102
Expecte
d Counts4357*.72
7
= 3167.53
94357*.207
=
901.8994357*.048
=
209.1364357*.028
=
121.996
Test Stat =
(3109 −
3167.539)2
3167.539(902 − 901.899)2
+
901.899(244 − 209.136)2
+
209.136(102 − 121.996)2
+
121.996
Question 3 point : Quiz Submissions - Week 8 Knowledge Check Homework Practice Questions - MATH302 I005 Fall -APEI
https://myclassroom.apus.edu/d2l/lms/quizzing/user/quiz_submissions_attempt.d2l?
isprv=0&qi=189606&ai=2082570&isInPopup=0&cfql=0&fromQB=… 3/14A company that develops over-the-counter medicines is working on a new product that is meant to shorten the
length of sore throats. To test their product for effectiveness, they take a random sample of 110 people and
record how long it took for their symptoms to completely disappear. The results are in the table below. The
company knows that on average (without
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