Casio FX-82AU PLUS Waiting time investigation

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Waiting time investigation

Onaverage,howlongdocustomerswaitinyou rschoolcanteenqueuebeforetheyhave 

completedtheirpurchases?Inthisactivity youwillbeinvestigatingthisquestionandev aluating

theresults.

· Awatchthatmeasurestimeinminutesandseco nds

· Penandpaperforrecordingresults

· ACasiofx82AUPLUScalculator

· Ingroupsof3assigneachpersononeoftherol esoftimer,recorderorcustomerselector.

· Arrangefordifferentgroupstomeasurecustom erwaitingtimesatthebeginning,middle

andendofbuyingtimes.

· Tomakesureyourresultsarevaliditisimpo rtanttochoosearandomsampleof

customerstotime.The‘customerselector’wi llusethecalculator’srandomnumber

generatortochoosecustomers.Setthecalculat ortoLine10andfixthedisplaytoshow2

decimalplaces.WhenyoupressSHIFT. pthecalculatorwillshowadecimal

number.Iftherandomnumberislessthan0 .50selectthenextcustomerthatjoinstheline

totime.Eachtimeyoupresspanotherra ndomnumberwillbedisplayed.

· The‘timer’measuresthetimefromwhenthes electedcustomerjoinsthequeueuntilthey

moveawayfromthecounter.

· Recordthetimeforatleast10randomlysel ectedcustomers.

· SetthecalculatortostatisticsbypressingMO DEthen2(forstats)then1(for1

VAR).

· Usethe xbuttontoenterthewaitingtime sinminutesandseconds.e.g.enter2minutes

and35secondsbypressing2 x 35 xandthecalculatorwilldisp laythe

amountautomaticallyas2.5833minutes.After youhaveenteredallthetimespressC.

ThenpressSHIFT1(stats) 4(Var ).Thescreenoptionsshowthatpressing2wi ll

givethemean.Press2thenptofindthe meanofthetimes.Thecalculatorwillshow

thetimeasadecimal.PressSHIFTx tosh owthetimeinminutesandseconds.

· Comparetheresultsfromdifferentgroups.Ar etheythesame?Iftheyaredifferent

suggestareasonforthedifference.

· Usetheinformationtodeterminewhethercusto mershavetowaittoolong.Ifthetimes

aretoolong,canyousuggestawaytoshort enthetime?

Writeareportofyourinvestigationandyourf indings.Givethereporttosomeonewhocan

implementanysuggestionsyoucanmake.