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R Questions Set 33:

Quiz Mode

How do we open saved workspaces?

set

get

load

None of the above

Solution:

_______ is a tool for checking normality.

qline()

anova()

qqnorm()

lm()

Solution:

Which function can be used to coerce other objects into lists?

as.list

has.lists

in.lists

co.lists

Solution:

Which function is used to loop over a list and evaluate a function on each element?

apply()

sapply()

lapply()

mapply()

Solution:

Which function is used to read a .csv file in the R programming language?

write.csv()

read.csv()

let.csv()

table.csv()

Solution:

What type of plot(s) are used to view the linear regression?

Box plot

Density plot

Scatter plot

Scatter plot and box plot

Solution:

________ is rapidly being adopted for computing descriptive and query types of analytics on Big Data.

Hadoop

Azure

EDR

InfoSight

Solution:

An ordered factor is used to represent an ordinal variable

Simple variable

Ordinal variable

Coordinal variable

Biordinal variable

Solution:

In the base graphics system, which function(s) is/are used to add elements to a plot?

Boxplot()

Text()

Boxplot() or Text()

Treat()

Solution:

If a linear regression model fits the training data perfectly (i.e., the training error is zero), then ______________________

the test error is non-zero

the test error is also always zero

the test error is equal to the training error

we cannot comment on the test error

R Questions Set 33:

How do we open saved workspaces?

Solution:

_______ is a tool for checking normality.

Solution:

Which function can be used to coerce other objects into lists?

Solution:

Which function is used to loop over a list and evaluate a function on each element?

Solution:

Which function is used to read a .csv file in the R programming language?

Solution:

What type of plot(s) are used to view the linear regression?

Solution:

________ is rapidly being adopted for computing descriptive and query types of analytics on Big Data.

Solution:

An ordered factor is used to represent an ordinal variable

Solution:

In the base graphics system, which function(s) is/are used to add elements to a plot?

Solution:

If a linear regression model fits the training data perfectly (i.e., the training error is zero), then ______________________

Solution:

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