BIDA 630 Data Analytics Final Exam
questions with correct answers
Identify |whether |the |task |required |is |supervised |or |unsupervised |learning: |Predicting
|whether |a |company |will |go |bankrupt |based |on |comparing |its |financial |data |to |those |
of |similar |bankrupt |and |nonbankrupt |firms. |- |VERIFIED |ANSWER✔✔-Supervised |
learning, |all |information |evaluated |is |known
Identify |whether |the |task |required |is |supervised |or |unsupervised |learning: |Printing |of
|custom |discount |coupons |at |the |conclusion |of |a |grocery |store |checkout |based |on |
what |you |just |bought |and |what |others |have |bought |previously. |- |VERIFIED |
ANSWER✔✔-Unsupervised |learning; |outcomes |are |unknown
True |or |false: |The |test |data |are |used |to |build |models, |or |to |further |tweak |the |model |
or |improve |its |fit. |- |VERIFIED |ANSWER✔✔-False
_____________ |is |used |for |assessing |the |performance |of |the |final |chosen |model |on |
new |data |- |VERIFIED |ANSWER✔✔-The |test |data |partition
When |a |model |is |fit |to |training |data, |zero |error |with |those |data |is |not |necessarily |
good. |This |special |case |is |called |______. |- |VERIFIED |ANSWER✔✔-Overfitting
True |or |false: |Bar |charts |are |useful |for |comparing |a |single |statistic |(e.g. |average, |
count, |percentage) |across |groups. |The |height |of |the |bar |represents |the |value |of |
statistic, |and |different |bars |correspond |to |different |groups. |- |VERIFIED |ANSWER✔✔-
True
Which |of |the |following |are |the |most |popular |visualization |tools |in |JMP_Pro? |- |
VERIFIED |ANSWER✔✔-Graph |Builder, |Fit |Y |by |X, |Distribution
Scatter |plots |play |important |role |in |prediction. |Next |step |can |be |developing |a |model.
|Scatter |plots |provide |information |about |relationships |(linear |or |non-linear) |between |
variables. |The |variables |in |scatter |plot |________. |- |VERIFIED |ANSWER✔✔-Numerical
In |a |box |plot, |the |box |include |%50 |of |the |data, |the |horizontal |line |represents |
(i)____________, |the |top |and |bottom |of |the |box |represent |(ii)________, |respectively. |- |
VERIFIED |ANSWER✔✔-(i) |the |Median |(50th |percentile); |(ii) |the |75th |and |25th |
percentiles
In |JMP |a |diamond |is |displayed |in |the |box, |where |the |center |of |the |diamond |is |
_________. |- |VERIFIED |ANSWER✔✔-The |mean
The |density |ellipsoid |in |scatterplot |matrix |is |a |good |graphical |indicator |of |the |
correlation |between |two |variables. |The |ellipsoid |collapses |diagonally |as |the |
correlation |between |the |two |variables |approaches |either |1 |or |-1.
The |ellipsoid |is |more |circular |if |the |two |variables |are |more |correlated. |(TRUE |or |
FALSE?) |- |VERIFIED |ANSWER✔✔-False; |The |ellipsoid |is |more |circular |(less |diagonally |
oriented) |if |the |two |variables |are |less |correlated
True |or |False: |Sensitivity |and |Specificity |are |plotted |on |an |ROC |Curve. |- |VERIFIED |
ANSWER✔✔-True
To |obtain |an |honest |estimate |of |future |classification |error, |we |use |the |classification |
questions with correct answers
Identify |whether |the |task |required |is |supervised |or |unsupervised |learning: |Predicting
|whether |a |company |will |go |bankrupt |based |on |comparing |its |financial |data |to |those |
of |similar |bankrupt |and |nonbankrupt |firms. |- |VERIFIED |ANSWER✔✔-Supervised |
learning, |all |information |evaluated |is |known
Identify |whether |the |task |required |is |supervised |or |unsupervised |learning: |Printing |of
|custom |discount |coupons |at |the |conclusion |of |a |grocery |store |checkout |based |on |
what |you |just |bought |and |what |others |have |bought |previously. |- |VERIFIED |
ANSWER✔✔-Unsupervised |learning; |outcomes |are |unknown
True |or |false: |The |test |data |are |used |to |build |models, |or |to |further |tweak |the |model |
or |improve |its |fit. |- |VERIFIED |ANSWER✔✔-False
_____________ |is |used |for |assessing |the |performance |of |the |final |chosen |model |on |
new |data |- |VERIFIED |ANSWER✔✔-The |test |data |partition
When |a |model |is |fit |to |training |data, |zero |error |with |those |data |is |not |necessarily |
good. |This |special |case |is |called |______. |- |VERIFIED |ANSWER✔✔-Overfitting
True |or |false: |Bar |charts |are |useful |for |comparing |a |single |statistic |(e.g. |average, |
count, |percentage) |across |groups. |The |height |of |the |bar |represents |the |value |of |
statistic, |and |different |bars |correspond |to |different |groups. |- |VERIFIED |ANSWER✔✔-
True
Which |of |the |following |are |the |most |popular |visualization |tools |in |JMP_Pro? |- |
VERIFIED |ANSWER✔✔-Graph |Builder, |Fit |Y |by |X, |Distribution
Scatter |plots |play |important |role |in |prediction. |Next |step |can |be |developing |a |model.
|Scatter |plots |provide |information |about |relationships |(linear |or |non-linear) |between |
variables. |The |variables |in |scatter |plot |________. |- |VERIFIED |ANSWER✔✔-Numerical
In |a |box |plot, |the |box |include |%50 |of |the |data, |the |horizontal |line |represents |
(i)____________, |the |top |and |bottom |of |the |box |represent |(ii)________, |respectively. |- |
VERIFIED |ANSWER✔✔-(i) |the |Median |(50th |percentile); |(ii) |the |75th |and |25th |
percentiles
In |JMP |a |diamond |is |displayed |in |the |box, |where |the |center |of |the |diamond |is |
_________. |- |VERIFIED |ANSWER✔✔-The |mean
The |density |ellipsoid |in |scatterplot |matrix |is |a |good |graphical |indicator |of |the |
correlation |between |two |variables. |The |ellipsoid |collapses |diagonally |as |the |
correlation |between |the |two |variables |approaches |either |1 |or |-1.
The |ellipsoid |is |more |circular |if |the |two |variables |are |more |correlated. |(TRUE |or |
FALSE?) |- |VERIFIED |ANSWER✔✔-False; |The |ellipsoid |is |more |circular |(less |diagonally |
oriented) |if |the |two |variables |are |less |correlated
True |or |False: |Sensitivity |and |Specificity |are |plotted |on |an |ROC |Curve. |- |VERIFIED |
ANSWER✔✔-True
To |obtain |an |honest |estimate |of |future |classification |error, |we |use |the |classification |
