UsingtheGDCfor1variablestatistics:TiNspire
Forthedataset:
5,6,7,6,2,8,9,8,4,6,7,4,5,4,3,6,6
Nspireinstructions:
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Openaspreadsheetdocument
EnterthedataintothecellsofcolumnA
EnteralabelforColumnA,suchas“list”(don’t
useasinglelettersuchasxory).
PressMENU,4:Statistics,1:StatCalculations,
1:One-VariableStatistics
Inpop-upbox,enter“1”fornumberoflists,
OK
Forthe“X1List”selectthelabelforcolumnA
youusedbefore–inthiscase“list”
Frequencylistis“1”ORifyouentered
frequenciesinlistB,youwouldnowselectthe
labelforthatcolumn
Youmayliketochangethe“1stresultcolumn”
fromthedefault(egtocolumnd),OK
Theresultswillbedisplayedin2columns–the
firsthasthetypeofstatisticandnexttoitis
thevalue.
Inorder,theresultsgivenare:
mean,
Σx,
Σx2,
StandarddeviationSx(whichweDON’TUSE),
Standarddeviationσx(whichweDOUSE),
n(totalnumberofdatavalues),
MinX(minimumvalueofx),
Q1X(firstquartile),
MedianX,
Q3X(thirdquartile),
MaxX(maximumvalueofX),
SSX(
∑ ( x− x)
2
)
UsingtheGDCfor1variablestatisticswitha
frequencytable:
DiscreteData
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Followinstructionsaboveuntildataentry–
scoreswillgointhefirstcolumn&frequency
inthesecond–labeleachcolumn
Choosethelabelfreqforthefrequencylist
Note:thenumberoflistsisSTILL1
UsingtheGDCfor1variablestatisticswithafrequencytable:GroupedData
Findthemeanandmedianintervalfortheheightsofplayersonthevarsityvolleyballteams.
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Firstyouneedtocalculate(&writedown)thevaluesofthemidpoints(thisisworthonemark).
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Enterthemidpointsinthefirstcolumnandgiveadescriptivelabel(height).Enterthefrequenciesinthe
secondcolumnandlabelitfreq.
Followinstructionsabove,butnotethatthenumberoflistsisstillONE.
Selectfreqinthefrequencylist
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NotethattheGDCdisplaysamedianvaluethatisnotaninterval.UsuallythisisNOTTHERIGHTANSWER–we
findthemedianusingcumulativefrequencies.
UsingtheGDCfor1variablestatistics:Ti84
Forthedataset:
5,6,7,6,2,8,9,8,4,6,7,4,5,4,3,6,6
Ti84instructions:
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PressSTAT,1:Edit
EnterthedataintoL1bytypingthevaluefollowedbyENTER
PressSTAT,UserightarrowtoselectCALC,1:1-VarStats,ENTER
MakesureList:L1iswritten.(Ifyouneedtochangethelistnumber,press2ndandthenumberneeded)
SelectCalculateandENTER(Frequencyliststaysblank)
Inorder,theresultsgivenare:
mean,
Σx,
Σx2,
StandarddeviationSx(whichweDON’TUSE),Standarddeviationσx(whichweDOUSE),
n(totalnumberofdatavalues),
MinX(minimumvalueofx),
Q1X(firstquartile),
MedianX,
Q3X(thirdquartile),
MaxX(maximumvalueofX),
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Toquicklyclearolddata,movethecursortotheheading(egL1)withtheuparrow;pressCLEARthenENTER
UsingtheGDCfor1variablestatisticswithafrequencytable:DiscreteData
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EnterthescoresinL1andenterthefrequenciesinL2
FollowinstructionsabovebutthefrequencylistwillbeL2
UsingtheGDCfor1variablestatisticswithafrequencytable:GroupedData
Findthemeanandmedianintervalfortheheightsofplayersonthevarsityvolleyballteams.
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Firstyouneedtocalculate(&writedown)thevaluesofthemidpoints(thisisworthonemark).
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EnterthemidpointsinL1andenterthefrequenciesinL2
Followinstructionsabove
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NotethattheGDCdisplaysamedianvaluethatisnotaninterval.UsuallythisisNOTTHERIGHTANSWER–we
findthemedianusingcumulativefrequencies.