Intro to data science

Which code should work to make a histogram?

• histogram(~gender,data=cdc

• Histogram(~gender, data = cdc)

• histogram(~gender,data=cdc)

• histogram(gender,data=cdc)

What is the code to display the count of your variable?

• count (sugar, data = food)

• tally (sugar, data = food)

• count (~sugar, data = food)

• tally (~sugar, data = food)

Which graph is better for CATEGORICAL VARIABLE?

• bargraph

• histogram

• scatterplot

• dotPlot

When you load a data in RStudio, in which section it pops up?

• File

• Environment

• Viewer

• History

What does the following code display?

dim (cdc)

• Number of rows

• Number of Columns

• The Variables

• Both the number of rows and Columns

Which code tells us if a variable is numerical or categorical?

• data(file)

• str(file)

• View(file)

• names(file)

Which one is the code to make a dotplot?

• dotplot(~variable, data = file)

• Dotplot(~variable, data = file)

• dotPlot(~variable, data = file)

• DotPlot(~variable, data = file

Which symbol do we use to split the graph ?

• /

• ~

• |

• \

What are the 3 steps of getting our survey data into RStudio?

• Export, Import, Upload

• Export, Upload, Import

• Download, import, Export

• Import, Download, Export

Which code does not produce a proper graph?

• histogram(~height,data=cdc)

• bargraph(~gender,data=cdc)

• xyplot(~height,data=cdc)

• dotPlot(~healthy_level,data=food)