ISYEl 6501l Midterml Examl 1l Latestl

ISYEl 6501l Midterml Examl 1l (Latestl 2025/l 2026l Update)l Introductionl tol Analyticsl Modelingl Reviewl |Questionsl &l Answers|l Gradel A|l 100%l Correctl (Verifiedl Solutions)

Q:l whatl isl R2l andl whyl isl itl important

Answer:

R2l measuresl howl welll thel regressionl linel approximatesl thel actuall data.

itl isl thel Coefficientl ofl determination

Q:l howl dol youl calculatel R2?

Answer:

R2l =l 1l -l SSR/SST

Q:l whatl isl SSRl andl SST

Answer:

SSRl =l Suml squaredl regression

SSTl =l totall suml ofl squares

Q:l whatl isl thel p-valuel andl whatl isl thel commonl valuel maxl used?

Answer:

measuresl thel likelihoodl ofl observingl al resultl asl extremel orl morel extremel thatl whatl wasl observed.l

• / 3

Q:l whatl doesl Regressionl helpl usl answer?

Answer:

Descriptivel andl Predictivel questions

Q:l whatl isl this:l yl =l a0l +l a1x1l +l amxm

Answer:

regressionl withl ml observations

Q:l givenl thel baseballl examplel ofl regressionl coefficients,l whatl isl thel responsel andl predictors

Answer:

response:l Howl manyl runsl al teaml scoredl thatl season

Predictors:l numberl ofl homel runs,l triples,l doubles,l singles,l outs,l doublel plays,l etl cetera

Q:l givenl thel heightl examplel ofl regressionl coefficients,l whatl isl thel responsel andl thel predictors

Answer:

response:l al person'sl heightl asl anl adult

predictors:l fathersl height,l mothersl height,l agel 2l height,l malel orl female

Q:l Providel definitionl for: predictivel analysis,l descriptivel analysis,l prescriptivel analysis

Answer:

predictive:l whatl WILLl happenl (forecasting)

descriptive:l

prescriptive:

• / 3

Q:l whatl goesl inl rowsl andl whatl goesl inl columns

Answer:

rows:l datal point

columns:l attributes,l predictors,l factors,l covariant

Q:l whatl isl Structuredl data?l givel anl example

Answer:

datal thatl canl bel structured,l likel quantitativel andl qualitativel data.l anl examplel wouldl bel creditl score,l age,l sales,l hairl color,l M/F,l etc

Q:l whatl isl un-structuredl data?l givel anl example

Answer:

datal thatl isl notl easilyl describedl andl stored.l Examplel isl writtenl text.

Q:l isl anl imagel structuredl orl unstructuredl data?

Answer:

unstructured

Q:l isl al FICOl scorel structuredl orl unstructuredl data?

Answer:

Structured

Q:l isl timel seriesl datal structuredl orl unstructuredl data?

Answer:

structured

Q:l whatl isl timel seriesl data?l givel anl example

• / 3