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STRAIGHTERLINE INTRODUCTION TO STATISTICS QUESTIONS AND ANSWERS

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STRAIGHTERLINE INTRODUCTION TO STATISTICS QUESTIONS AND ANSWERS

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STRAIGHTERLINE INTRODUCTION TO
STATISTICS QUESTIONS AND
ANSWERS




Four qsteps qin qthe qprocess qof qstatistics q- qcorrect qanswers q-1. qProducing qData
2. qExploratory qData qAnalysis
3. qProbability
4. qInference

Categorical qvariable q- qcorrect qanswers q-places qindividuals qinto qone qof qseveral
qgroups
Two qtypes: qnominal qand qordinal

Quantitative qVariable q- qcorrect qanswers q-represents qa qmeasurement qor qa qcount
Two qtypes: qInterval qand qratio

Nominal qVariable q- qcorrect qanswers q-categorical qvariables qwhere qthere qis qno
qnatural qorder qamong qthe qcategories

, Ordinal qvariable q- qcorrect qanswers q-categorical qvariables qwhere qthere qis qnatural
qorder qamong qthe qcategories


Interval qVariable q- qcorrect qanswers q-a qmeasurement qor qcount qfor qwhich qit
qmakes qsense qto qtalk qabout qthe qdifference qbetween qvalues, qbut qit qdoes qnot
qmake qsense qto qtalk qabout qthe qratio qbetween qvalues; q0 qdoes qnot qrepresent qthe
qabsence qof qquanitity


Ratio qVariable q- qcorrect qanswers q-quantitative qvariables qfor qwhich qit qmakes
qsense qto qtalk qabout qthe qdifference qbetween qvalues qAND qthe qratio qbetween
qvalues; q0 qrepresents qthe qabsence qof qquantity


What qtype qof qvariable?:
eye qcolor q- qcorrect qanswers q-nominal

What qtype qof qvariable?:
socioeconomic qstatus qwith qcategories qlow, qmed, qhigh q- qcorrect qanswers q-Ordinal

What qtype qof qvariable?:
Temperature q- qcorrect qanswers q-Interval

What qtype qof qvariable?:
Income q- qcorrect qanswers q-Ratio

Visual qdisplay qand qnumerical qsummary qfor qa qsingle qcategorical qvariable q- qcorrect
qanswers q-pie qchart qor qbar qchart
and qcategory qpercentages

Visual qdisplay qand qnumerical qsummary qfor qa qsingle qquantitative qvariable q-
qcorrect qanswers q-histogram qor qstemplot
qand qdescriptive qstatistics


Visual qdisplay qand qnumerical qsummary qfor qC->C q- qcorrect qanswers q-Two qway
qtable qand qconditional qpercentages


Visual qdisplay qand qnumerical qsummary qfor qC->Q q- qcorrect qanswers q-Side qby
qside qbox qplots qand qdescriptive qstatistics


Visual qdisplay qand qnumerical qsummary qfor qQ->Q q- qcorrect qanswers q-Scatterplot
qand qcorrelation qcoefficient q(r)


Standard qDeviation qRule q- qcorrect qanswers q-Approximately q
68% qof qobservations qfall qwithin q1 qsd qof qthe qmean, q
95% qwithin q2 qsd, q
99.7% q(or qvirtually qall) qwithin q3 qsds

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