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Final

STA 205 Lecture Notes - Lecture 11: Water AerobicsExam


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

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12/17/2018 NKU Imath Assessment
https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=154596&uid=11461 1/11
Grade Book Detail
Damico , Emily
Topic 11: Two Sample Inferences for the Mean
Started: November 26, 2018, 10:31 am
Last change: November 27, 2018, 1:06 pm
Total time questions were on‑screen: 103.5 minutes.
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12/17/2018 NKU Imath Assessment
https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=154596&uid=11461 2/11
Foreachofthefollowingscenarios,determinewhetherindependentordependentsampleswere
selected.Note:Youmayonlyattemptthisquestion2times.Onyoursecondattempt,apenaltywillbe
assessed.
Asampleof47participantswasrecruitedtoparticipateinastudyassessingtheeffectofcellphoneradiation
onbrainactivity.Theparticipantshadacellphoneplacedontheirearinthenturnedonfor50minutes.Brain
activitywasthenmeasured.Afteranhour,thecellphonewasplacedontheirearbutturnedoff.Brain
activitywasmeasuredagain.
independentsamples
dependentsamples
Astudywasconductedtoexaminetheeffectofdietsoftdrinkconsumptiononcalciumlevelsinwomen.A
sampleof16womenwastakenandrandomlysplitintotwogroupsof8women.Thefirstgroupwas
instructedtodrink24ouncesofadietsoftdrinkeachday.Thesecondgroupwasinstructedtodrink24
ouncesofwatereachday.Theirurinewasthencollectedandtheamountofcalciumintheirurinewas
measured.
independentsamples
dependentsamples
Apsychologistsamples75siblingsinordertodetermineifthereisadifferenceinIQscoresfortheoldest
andyoungestsibling.
dependentsamples
independentsamples
Arestaurantwantstocomparethetypicalbillforthosepayingwithcreditcardcomparedtothosepaying
withcash.Asampleof106creditcardpaymentsisselectedandasampleof51cashpaymentsisselected.
Thebillamountforallpaymentsisrecorded.
dependentsamples
independentsamples

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12/17/2018 NKU Imath Assessment
https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=154596&uid=11461 3/11
AreporterwantstocomparethemeancommutetimesinCincinnatiandIndianapolis.Arandomsampleof
50commutetimesfromCincinnatiresidentsistaken,aswellasarandomsampleof50commutetimesfrom
Indianapolis.
dependentsamples
independentsamples
Answer:dependentsamples
Answer:independentsamples
Answer:dependentsamples
Answer:independentsamples
Answer:independentsamples
Question 1: 3.5 (parts: 1, 0.5, 0.5, 0.5, 1) out of 5 (parts: 1, 1, 1, 1, 1)in 2 attempt(s)
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