UNIT 4 - PRACTICE MILESTONE QUESTIONS WITH CORRECT ANSWERS

UNIT 4 - PRACTICE MILESTONE
QUESTIONS WITH CORRECT ANSWERS



WhichsofsthesfollowingsissNOTsasguidelinesforsestablishingscausality?s-
sChecksifstheseffectsisspresentsorsabsentswhensthesresponsesvariablesisspresentsorsabsent.



Jamesstakesstwosdataspointssfromsthesweightsandsfeedscostsdatassetstoscalculatesasslope,s
orsaveragesratesofschange.sAsguineaspigsweighss3spoundssandscostss$3.50spersweekstosfe
ed,swhilesasChihuahuasweighss4.8spoundssandscostss$6.20spersweekstosfeed.

Usingsweightsassthesexplanatorysvariable,swhatsissthesslopesofstheslinesbetweensthesestwo
spoints?sAnswerschoicessaresroundedstosthesnearestshundredth.s-s$1.50s/slb.



Usingsthesprovidedsscatterplot,sselectsthescorrectsdirectionsofsthesbluesoutlier.s-
sThesoutliersissinsthesy-direction.



Asclinicshassrecordedsthesage,sx,sversussweight,sy,sofsmanysbabiessforstheirsfirsts12smonth
ssofslife,sandsclaimstheslinesofsbestsfitsissŷs=s0.60xs+s3.3,swheresysissinskg,sandsxsissinsmonth
s.

Asnewsbaby,swhosiss10smonthssandsweighss10skg,sissaddedstosthesclinicsrecords.

Whatsissthesresidualsofsthesdatasforsthissnewsbaby?s-s0.7skg

ForsasBiologysassignment,sLisascollectedsdatasonsplantsgrowthsofsassunflowerseverysweeks
fors9sweeks.sWhensLisasfirstsplantedsthessunflower,sitswass10scentimetersstall.sThestimes(in
sweeks)sissplottedsagainststhesheights(inscentimeters)sassshownsbelow.



Usingsthesbest-
fitsline,sapproximatelyshowstallswassthessunflowersplantsduringsthes7thsweek?s-
s37scentimeters



GarysSandovalsissasphotographerswhosisswonderingsifstheresissansassociationsbetweensth
esnumbersofsphotographsshestakessandspercentscloudscoverage.sHissrecordsissshownsinsth
esscatterplot.