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STA 205 Assignment 9

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2018/2019 Written for academic year
Institution Northern Kentucky University
Course STA 205
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This is a comprehensive and detailed assignment n.o 9 for STA 205.

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12/17/2018




Topic 9: Hypothesis Test for the Mean

Started: October 30, 2018, 2:04 pm
Last change: October 31, 2018, 2:07 pm
Total time questions were on‑screen: 63.4 minutes.

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AsAmericanshavebecomemoreenvironmentallyconscious,therehasbeenasocialshiftingeneralpublic’s
feelingstowardsrecycling.Inrecentyears,anumberofcompanieshavegoneintothebusinessofcollecting
usednewspapersfromhouseholdsandrecyclingthem.Afinancialanalystforonesuchcompanyhas
recentlydeterminedthatthefirmwouldmakeaprofitifthemeanweeklynewspapercollectionfrom
householdsexceeded2pounds.Theteststatisticisfoundtobet=2.480.Matchtheprobabilities(pvalues)
belowtotheclaimwhichwouldbetestedtodetermineifthefirmwouldbeprofitable.


0.9923 a.greaterthanalternative
0.0154 b.notequaltoalternative
0.0077 c.lessthanalternative



Answer:cba
Question 1: 3 out of 3 in 2 attempt(s)




https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=152739&uid=11461 1/9

, 12/17/2018 NKU Imath Assessment


Asportsenthusiastwouldliketodetermineiftheaveragenumberofpenaltyminutespergameforteamsin
theNationalHockeyLeagueisgreaterthan12minutes.Asampleof30gamewastaken,andthenumberof
penaltyminutesineachgamewasrecorded.

Selecttheappropriatehypothesestobetested.
   
   


Thesampleof30gamesisselected,andtheteststatisticisfoundtobet=1.02forthedatacollected.

Whichoftheprobabilities(pvalues)belowwouldbeassociatedwiththelessthanalternative?
0.1581 0.3162 0.8419

Whichoftheprobabilities(pvalues)belowwouldbeassociatedwiththetwosidedalternative?
0.8419 0.1581 0.3162

Whichoftheprobabilities(pvalues)belowwouldbeassociatedwiththegreaterthanalternative?
0.3162 0.1581 0.8419


Usingtheprobabilityselectedabovethatcorrespondstothealternativehypothesisyouselectedinthefirst
questiontotesttheclaim,whattypeoferrorispossibleinthistestusingasignificancelevelof0.01?


TypeIerror
TypeIIerror



Answer: 

Answer:0.8419
Answer:0.3162
Answer:0.1581
Answer:TypeIIerror
Question 2: 5 (parts: 1, 1, 1, 1, 1) out of 5 (parts: 1, 1, 1, 1, 1)in 2 attempt(s)




https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=152739&uid=11461 2/9

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