2VS Exercise Set 3 - SECTION 1A PRE-ALGEBRA · Two-Variable Statistics – Exercise Set 3 1. The...
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Two-Variable Statistics – Exercise Set 3 1. The scatter plot shows the number of times a player came to bat and the number of hits they had. The scatter plot includes a point at (318,80). Describe the meaning of this point in this situation. 2. The scatter plot shows the number of minutes people had to wait for service at a restaurant and the number of staff available at the time. A line that models the data is given by the equation = −1.62 + 18, where represents the wait time, and represents the number of staff available. a. The slope of the line is -1.62. What does this mean in this situation? Is it realistic? b. The -intercept is (0,18). What does this mean in this situation? Is it realistic?
Transcript of 2VS Exercise Set 3 - SECTION 1A PRE-ALGEBRA · Two-Variable Statistics – Exercise Set 3 1. The...
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Two-VariableStatistics–ExerciseSet31. Thescatterplotshowsthenumberoftimesaplayercametobatandthenumberof
hitstheyhad.
Thescatterplotincludesapointat(318,80).Describethe
meaningofthispointinthissituation.
2. Thescatterplotshowsthenumberofminutespeoplehadtowaitforserviceata
restaurantandthenumberofstaffavailableatthetime.
Alinethatmodelsthedataisgivenbytheequation𝑦 = −1.62𝑥 + 18,where𝑦representsthewaittime,and𝑥representsthenumberofstaffavailable.
a.Theslopeofthelineis-1.62.Whatdoesthismeaninthissituation?Isitrealistic?
b.The𝑦-interceptis(0,18).Whatdoesthismeaninthissituation?Isitrealistic?
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3. Ataxidriverrecordsthetimerequiredtocompletevarioustripsandthedistanceforeachtrip.
Thebestfitlineisgivenbytheequation𝑦 = 0.467𝑥 + 0.417,where𝑦representsthedistanceinmiles,and𝑥representsthetimeforthetripinminutes.
a. a.Usethebestfitlinetoestimatethedistanceforatripthattakes20minutes.Showyourreasoning.
b.Usethebestfitlinetoestimatethetimeforatripthatis6mileslong.Showyourreasoning.
4. Dataiscollectedaboutthenumberofwinsandlossesbyarandomsampleofteams
withananimalmascotandthosewithanotherkindofmascot.Thecolumnrelativefrequenciesareshowninthetable.Basedontheinformationinthetable,isthereanassociationbetweenthevariables?Explainyourreasoning.
animalmascot othertypeofmascotwins 74% 49%losses 26% 51%
5. Arandomselectionofindoorandoutdoorpoolmanagersaresurveyedaboutthenumberofpeopleineachagegroupthatswimthere.Resultsfromthesurveyaredisplayedinthetwo-waytable.Basedonthedata,doesthereappeartobeanassociationbetweenpooltypeandagegroup?Explainyourreasoning.
outdoorpool indoorpoolyoungerthan18 317 4118orolder 352 163
6. Datafromarandomsampleofpeoplearecollectedabouthowtheywatchmoviesinthegenresofactionormystery.Whichvaluewouldbestfitinthemissingcelltosuggestthereisnoassociationbetweenthegenreandhowthemoviesarewatched?
streamingmovies discrentalaction 526 147mystery 317
