Exam (elaborations)
MAT-240 INTRODUCTION TO STATISTICS MILESTONE 4 QUESTIONS WITH CORRECT ANSWERS
- Course
- Institution
MAT-240 INTRODUCTION TO STATISTICS MILESTONE 4 QUESTIONS WITH CORRECT ANSWERS
[Show more]
Content preview
MAT-240 INTRODUCTION TOSTATISTICS MILESTONE 4 QUESTIONS
WITH CORRECT ANSWERS
Twosbagsseachscontainsticketssnumbereds1stos10.sJohnsdrawssasticketsfromseachsbagsfives
times,sreplacingsthesticketssafterseachsdraw.sHesrecordssthesnumbersonsthesticketsforseach
sdrawsfromsbothsthesbags:
Bags1Bags2Draws124Draws245Draws313Draws464Draws579
Forsthesthesfirstsbag,sthesmeansiss4sandsthesstandardsdeviationsiss2.5.Forsthessecondsbag,s
thesmeansiss5sandsthesstandardsdeviationsiss2.3.
UsingsthesformulasbelowsorsExcel,sfindsthescorrelationscoefficient,sr,sforsthisssetsofsticketssJ
ohnsdrew.sAnswerschoicessaresroundedstosthesnearestshundredth.s-
sans✔✔ANSWERsIS:s0.75
Forsassetsofsdata,sxsissthesexplanatorysvariable.sItssmeansiss8.2,sandsitssstandardsdeviation
siss1.92.sForsthessamessetsofsdata,sysissthesresponsesvariable.sItssmeansiss13.8,sandsitsssta
ndardsdeviationsiss3.03.sThescorrelationswassfoundstosbes0.223.
Selectsthescorrectsslopesandsy-interceptsforsthesleast-squaressline.s-sans✔✔Slopes=s0.35
y-intercepts=s10.9
Jessestakesstwosdataspointssfromsthesweightsandsfeedscostsdatassetstoscalculatesasslope,s
orsaveragesratesofschange.sAshamstersweighsshalfsaspoundsandscostss$2spersweekstosfeed
,swhilesasLabradorsRetrieversweighss62.5spoundssandscostss$10spersweekstosfeed.
Usingsweightsassthesexplanatorysvariable,swhatsissthesslopesofsaslinesbetweensthesestwosp
oints?sAnswerschoicessaresroundedstosthesnearestshundredth.s-sans✔✔$0.13s/slb.
Asbanksmanagersdeclares,swithshelpsofsasscatterplot,sthatsthesnumbersofshealthsinsurance
sssoldsmayshavessomesassociationswithsthesnumbersofsinchessitssnows.sHowsmanyspolicie
ssweressoldswhensitssnoweds2stos4sinches?s-sans✔✔350
WhichsofsthesfollowingsstatementssissTRUE?s-
sans✔✔Highscorrelationsdoessnotsalwayssimplyscausation.
Datasforslengthsofsthestails(insmillimeters)sandsages(insdays)sofstadpolessissenteredsintosasst
atisticsssoftwarespackagesandsresultssinsasregressionsequationsofsŷs=s15s-s1.5x.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller AGRADEPROMASTER. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80435 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now