STA 205 Assignment 2

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This is a comprehensive and assignment n.o 2 with solutions for Sta 205.

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12/17/2018

Topic 2: Introductory Definitions & Summarizing Categorical Data

Started: September 3, 2018, 8:13 pm
Last change: September 6, 2018, 3:38 pm
Total time questions were on‑screen: 95.9 minutes.

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, 12/17/2018 NKU Imath Assessment

Atitswebsite,apollingcompanypublishesresultsofanewsurveyeachday.Attheendofthesurvey,the
followingparagraphisprintedsummarizinghowtheresultswerecollected.

Resultsarebasedontelephoneinterviewswith1,008nationaladults,aged18andolder,conductedon
April25,2007...Inadditiontosamplingerror,questionwordingandpracticaldifficultiesin
conductingsurveyscanintroduceerrororbiasintothefindingsofpublicopinionpolls.

Usethisinformationtoanswerthefollowing:

a.Forthissurveyidentifythepopulationofinterest.
everyoneinthenationthatis18+yearsold
everyonethatwascalled,whethertheyrespondedornot
everyonethatrespondedtothecall
everyoneinthenation

b.Thecompanyperformsitssurveysbyphoningnumbersgeneratedatrandomfromacomputer
program.Whatisthesamplingframe?
everyonethatdidnothavetheirphonenumbergenerated
everyonethathadtheirphonenumbergenerated
everyonewithatelephone
everyonethatrespondedtothecall

c.Whatproblems,ifany,wouldyoubeconcernedaboutinmatchingthesamplingframewiththe
population?
Somepeopledonothavetelephones.
Somepeoplewerenotavailabletoanswerthecall.
Somepeopleansweredthecall,butchosenottoparticipateinthesurvey.

Answer:everyoneinthenationthatis18+yearsold
Answer:everyonewithatelephone
Answer:Somepeopledonothavetelephones.

Question 1: 3 (parts: 1, 1, 1) out of 3 (parts: 1, 1, 1)in 2 attempt(s)

https://imath.nku.edu/course/gb-viewasid.php?stu=11461&cid=335&asid=146516&uid=11461 2/12

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