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Quiz

# STA 205 Quiz: ReviewEXAM3Exam

Department
Statistics
Course Code
STA 205
Professor
Brooke Buckley
Study Guide
Quiz

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12/17/2018 NKU Imath Assessment
https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=152188&uid=11461 1/11
Damico , Emily
Exam 3 Review
Started: October 23, 2018, 10:38 pm
Last change: October 23, 2018, 10:52 pm
Time spent: 14 minutes
Total time questions were on‑screen: 12.4 minutes.
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12/17/2018 NKU Imath Assessment
https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=152188&uid=11461 2/11
InastudyoftherelationshipbetweentheamountofviolenceapersonwatchesonNetflixandtheviewers
age,anumberofNetflixviewerswererandomlyselectedandclassifiedaccordingtotheiragegroupand
whethertheytendedtowatchmostly“lowviolence”or“highviolence”programs.Theinformationgathered
issummarizedintheStatCrunchoutputprovided:

a.OnewouldexpectNetflixviewersintheagerange1634towatchhighviolenceprogramsifthereisno
b.Fillinthetablesbelowwiththemarginaldistributionsforeachagegroup.Roundthepercentagesto2decimal
places.(6points)
Low
Violence
High
Violence   Low
Violence
High
Violence   Low
Violence
High
Violence
1634 % %  3554 % %  55+ % %
c.Basedonthedistributionsabove,there arelationshipbetweentheagerangethe
levelofviolencewatchedonNetflixbecausethereare acrossthethreeage
ranges.(3points)
d.Conducttheappropriatetesttodetermineifthereisarelationshipbetweenagerangeandlevelof
violencewatchedonNetflix.Useasignificancelevelof0.05.(13points)
 :agegroup toviolencelevel :agegroup
toviolencelevel
= reject ifprobability  
TS: =
probability<

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12/17/2018 NKU Imath Assessment
https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=152188&uid=11461 3/11
decision:
Atthe level,there significantevidencetoconcludearelationship
existsbetweenagegroupandviolencelevel.