STRAIGHTERLINE STATISTICS FINAL
EXAM WITH CORRECT QUESTIONS
AND AND ANSWERS
anais6is6organizing6her6rock6collection6and6places6each6rock6in6one6of6three6categories:
6small,6medium,6or6large.6this6illustrates6what6level6of6measurement?6-6answer-ordinal
which6of6the6following6is6an6example6of6a6nominal6variable?6-6answer-gender
what6sort6of6data6are6temperature6measurements?6-6answer-ratio
based6on6the6graph,6which6statement6best6describes6the6relationship6between6daily6hig
h6temperatures6and6the6number6of6people6going6to6the6beach?6-6answer-
it6is6negative6linear6relationship
the6table6shows6the6number6of6train6tickets6carl6purchased6to6each6station6over6the6last
6month6and6the6fare6to6each6station.6what6was6the6average6cost6per6ride?6-6answer-
$5.45
the6outcomes6observes6in6an6experiment6are:62,68,63,610,64,6and69.6what6is6the6sample6
variance?6-6answer-11.6
jason6collects6information6about6annual6family6income6from6each6student6at6his6college.
6he6computes6both6the6mean6and6median6family6income6across6all6students6and6is6sur
prised6to6find6that6the6mean6income6is6higher6than6the6median6income.6what6is6the6mos
t6likely6reason6for6the6difference6in6the6mean6and6the6median?6-6answer-
the6mean6is6more6affected6by6a6small6number6of6extreme6values
an6instructor6administers6a6test6to6a6class6of6306students6and6observes6that6the6scores6
are6close6to6normally6distributed6with6a6mean6score6of6406and6a6standard6deviation6of61
0.6what6can6you6conclude6from6these6results?6-6answer-
the6average6student6scored6at6the640th6percentile
laura's6quiz6scores6during6the6semester6were687,682,690,692,6and684.6what6was6her6me
an6score6-6answer-87
, the6table6lists6the6populations6and6relative6frequencies6of6car6ownership6in646neighborin
g6cities.6which6city6has6the6most6cars?6-6answer-westville
in6the6figure6shown,6sample6a6and6sample6b6have6the6same6-6answer-median
the6contingency6table6describes6the6living6arrangements6of6students6at6a6small6college.
6what6percentage6of6the6students6are6women6who6live6in6off-campus6housing?6-
6answer-54
which6of6these6correlation6coefficients6shows6the6strongest6linear6relationship6between6
26variables6-6answer--0.31
what6conclusion6can6be6drawn6from6the6graph6of6average6daily6temperature6and6hot6be
verage6sales6-6answer-
there6is6a6negative6correlation6between6average6daily6temperature6and6hot6beverage6s
ales
the6coefficient6of6correlation6r6is6a6measurement6of6statistical6relationships6that6are6-
6answer-linear
a6bag6contains6marbles6of6different6colors6(red,6yellow,6and6blue)6and6different6sizes6(s
mall6and6large).6the6probability6of6picking6a6blue6marble6out6of6the6bag6is60.106and6the6
probability6of6picking6a6large6marble6is60.50.6what6is6the6probability6of6picking6a6large6bl
ue6marble6-6answer-0.05
a6swimmer,6sarah,6hopes6to6compete6in6an6upcoming6meet.6there6are686team6members
6eligible6for6the6breaststroke6event6at6the6meet,6but6only616team6member6will6be6rando
mly6selected6to6compete6in6that6event.6there6are646team6members6eligible6for6the6butter
fly6event6at6the6meet,6but6only616team6member6will6be6randomly6selected6to6compete6in
6that6event.6sarah6is6eligible6to6compete6in6both6events.6what6is6her6chance6of6being6sel
ected6for6at6least6one6of6the6two6events6-6answer-36in68
The6graduating6class6of6a6small6college6has61706men6and61956women.6If6grades6and6g
ender6are6independent,6what6is6the6probability6that6students6with6the6two6highest6grade
6averages6will6be6both6women?6-6answer-0.28
A6high6school6student6applies6to6both6the6naval6Academy6and6West6Point.6The6diagra
m6shows6his6chances6of6being6accepted6to6each6school6and6the6chance6that6he6will6be6
accepted6to6both.6What6is6the6probability6that6he6will6be6accepted6to6at6least6one6of6the6
two6schools?6-6answer-16%
Which6type6of6data6would6have6a6discrete6probability6distribution?6-6answer-
Number6of6children6per6household6in6a6census
A6video6game6got6a6thumbs6up6rating6from64006out6of610006customer6surveyed.6The6cu
stomers6included62506women.6Assuming6that6gender6does6not6have6any6influence6on6t
EXAM WITH CORRECT QUESTIONS
AND AND ANSWERS
anais6is6organizing6her6rock6collection6and6places6each6rock6in6one6of6three6categories:
6small,6medium,6or6large.6this6illustrates6what6level6of6measurement?6-6answer-ordinal
which6of6the6following6is6an6example6of6a6nominal6variable?6-6answer-gender
what6sort6of6data6are6temperature6measurements?6-6answer-ratio
based6on6the6graph,6which6statement6best6describes6the6relationship6between6daily6hig
h6temperatures6and6the6number6of6people6going6to6the6beach?6-6answer-
it6is6negative6linear6relationship
the6table6shows6the6number6of6train6tickets6carl6purchased6to6each6station6over6the6last
6month6and6the6fare6to6each6station.6what6was6the6average6cost6per6ride?6-6answer-
$5.45
the6outcomes6observes6in6an6experiment6are:62,68,63,610,64,6and69.6what6is6the6sample6
variance?6-6answer-11.6
jason6collects6information6about6annual6family6income6from6each6student6at6his6college.
6he6computes6both6the6mean6and6median6family6income6across6all6students6and6is6sur
prised6to6find6that6the6mean6income6is6higher6than6the6median6income.6what6is6the6mos
t6likely6reason6for6the6difference6in6the6mean6and6the6median?6-6answer-
the6mean6is6more6affected6by6a6small6number6of6extreme6values
an6instructor6administers6a6test6to6a6class6of6306students6and6observes6that6the6scores6
are6close6to6normally6distributed6with6a6mean6score6of6406and6a6standard6deviation6of61
0.6what6can6you6conclude6from6these6results?6-6answer-
the6average6student6scored6at6the640th6percentile
laura's6quiz6scores6during6the6semester6were687,682,690,692,6and684.6what6was6her6me
an6score6-6answer-87
, the6table6lists6the6populations6and6relative6frequencies6of6car6ownership6in646neighborin
g6cities.6which6city6has6the6most6cars?6-6answer-westville
in6the6figure6shown,6sample6a6and6sample6b6have6the6same6-6answer-median
the6contingency6table6describes6the6living6arrangements6of6students6at6a6small6college.
6what6percentage6of6the6students6are6women6who6live6in6off-campus6housing?6-
6answer-54
which6of6these6correlation6coefficients6shows6the6strongest6linear6relationship6between6
26variables6-6answer--0.31
what6conclusion6can6be6drawn6from6the6graph6of6average6daily6temperature6and6hot6be
verage6sales6-6answer-
there6is6a6negative6correlation6between6average6daily6temperature6and6hot6beverage6s
ales
the6coefficient6of6correlation6r6is6a6measurement6of6statistical6relationships6that6are6-
6answer-linear
a6bag6contains6marbles6of6different6colors6(red,6yellow,6and6blue)6and6different6sizes6(s
mall6and6large).6the6probability6of6picking6a6blue6marble6out6of6the6bag6is60.106and6the6
probability6of6picking6a6large6marble6is60.50.6what6is6the6probability6of6picking6a6large6bl
ue6marble6-6answer-0.05
a6swimmer,6sarah,6hopes6to6compete6in6an6upcoming6meet.6there6are686team6members
6eligible6for6the6breaststroke6event6at6the6meet,6but6only616team6member6will6be6rando
mly6selected6to6compete6in6that6event.6there6are646team6members6eligible6for6the6butter
fly6event6at6the6meet,6but6only616team6member6will6be6randomly6selected6to6compete6in
6that6event.6sarah6is6eligible6to6compete6in6both6events.6what6is6her6chance6of6being6sel
ected6for6at6least6one6of6the6two6events6-6answer-36in68
The6graduating6class6of6a6small6college6has61706men6and61956women.6If6grades6and6g
ender6are6independent,6what6is6the6probability6that6students6with6the6two6highest6grade
6averages6will6be6both6women?6-6answer-0.28
A6high6school6student6applies6to6both6the6naval6Academy6and6West6Point.6The6diagra
m6shows6his6chances6of6being6accepted6to6each6school6and6the6chance6that6he6will6be6
accepted6to6both.6What6is6the6probability6that6he6will6be6accepted6to6at6least6one6of6the6
two6schools?6-6answer-16%
Which6type6of6data6would6have6a6discrete6probability6distribution?6-6answer-
Number6of6children6per6household6in6a6census
A6video6game6got6a6thumbs6up6rating6from64006out6of610006customer6surveyed.6The6cu
stomers6included62506women.6Assuming6that6gender6does6not6have6any6influence6on6t
