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Articles Home » Data Science » Data Science Dumps For EMC- E20-007

Data Science Dumps For EMC- E20-007

Question ID 16128
If R factors are categorical variables, which data classification level are they most closely
related?

Option A
Nominal

Option B
Ordinal

Option C
Interval

Option D
Ratio

Correct Answer A

Description
Update Date and Time 2017-12-14 03:26:57

Question ID 16129
Refer to the exhibit.

You have run a linear regression model against your data, and have plotted true outcome
versus predicted outcome. The R-squared of your model is 0.75. What is your assessment
of the model?

Option A
The R-squared may be biased upwards by the extreme-valued outcomes. Remove them and refit to get a better idea of the model's quality over typical data.

Option B
The R-squared is good. The model should perform well.

Option C
The extreme-valued outliers may negatively affect the model's performance. Remove them to see if the R-squared improves over typical data.

Option D
The observations seem to come from two different populations, but this model fits them both equally well.

Correct Answer A

Description
Update Date and Time 2017-12-14 03:28:02

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Question ID 16128	If R factors are categorical variables, which data classification level are they most closely related?
Option A	Nominal
Option B	Ordinal
Option C	Interval
Option D	Ratio
Correct Answer	A

Question ID 16129	Refer to the exhibit. You have run a linear regression model against your data, and have plotted true outcome versus predicted outcome. The R-squared of your model is 0.75. What is your assessment of the model?
Option A	The R-squared may be biased upwards by the extreme-valued outcomes. Remove them and refit to get a better idea of the model's quality over typical data.
Option B	The R-squared is good. The model should perform well.
Option C	The extreme-valued outliers may negatively affect the model's performance. Remove them to see if the R-squared improves over typical data.
Option D	The observations seem to come from two different populations, but this model fits them both equally well.
Correct Answer	A