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Quiz

STA 205 Quiz: ReviewEXAM2Exam


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=150076&uid=11461 1/7
Grade Book Detail
Damico , Emily
Exam 2 Review
Started: October 2, 2018, 11:05 am
Last change: October 2, 2018, 2:41 pm
Time spent: 216 minutes
Total time questions were on‑screen: 57.3 minutes.
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12/17/2018 NKU Imath Assessment
https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=150076&uid=11461 2/7
Thestudentloancrisishasgainedincreasingpress,andtheInstituteforCollegeAccess&Successrecently
publishedareportestimatingthepercentageofgraduatingseniorswhohadsomestudentloandebt.Asample
of944NKUgraduatefrom2016foundthat656hadsomestudentloandebt.
a.Whatisthepopulationofinterest?
All2016NKUgraduateswithstudentloandebt
Allcollegestudents
All2016NKUgraduates
Allcollegestudentswithstudentloandebt
b.Estimatethepercentageof2016NKUgraduateswhograduatefromtheuniversitywithsomestudent
loandebtwith90%confidence.
Formula:
Calculate:lowerlimit= upperlimit= (roundyouranswersto4decimal
placesinthisstep,donotconvertyouranswerstopercentages)
Interpret:With  %confidence,weestimatebetween %and
%of2016NKUgraduateshadsomestudentloandebt.
c.Doestheintervalaboveprovideevidencethatlessthan70%of2016NKUgraduateshavestudentloan
debt?
Theinterval  supportthisclaimbecuase
d.Universityadministratorswouldliketoconductanewsurveyof2018graduatestoupdatethis
estimate.Theywouldliketoincreasethelevelofconfidenceto99%withamarginoferrorof+1.83.If
theyweretousetheestimatefrom2016,howmanygraduatesshouldbeincludedinthenewsample?
e.Ifthe2016estimatewerenotusedwhencalculatingthesamplesizeinpartd,whateffectwouldthis
havehad?
Thesamplesizewoulddecrease.
Therewouldbenoeffectonthecalculatedsamplesize.
Thesamplesizewouldincrease.
Answer:All2016NKUgraduates
Answer:
Answer:0.6702
Answer:0.7196
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