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MCQ gg intro test

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Question 1 of 16

1. Question
True or False: The {ggplot2} package is part of the {tidyverse} meta-package.
- _x000D_
  
  A
  _x000D_
  
  FALSE
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  TRUE
  _x000D_
Correct

Incorrect
Question 2 of 16

2. Question
What does the gg in ggplot2 stand for?
- _x000D_
  
  A
  _x000D_
  
  Graphical geometries
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  Grey goose
  _x000D_
- _x000D_
  
  C
  _x000D_
  
  Grammar of graphics
  _x000D_
- _x000D_
  
  D
  _x000D_
  
  Good game
  _x000D_
Correct

Incorrect
Question 3 of 16

3. Question
What is the name of the most robust R package for data visualization?
- _x000D_
  
  A
  _x000D_
  
  {base}
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  {ggplot}
  _x000D_
- _x000D_
  
  C
  _x000D_
  
  {tidyverse}
  _x000D_
- _x000D_
  
  D
  _x000D_
  
  {ggplot2}
  _x000D_
Correct

Incorrect
Question 4 of 16

4. Question
True or False: The {ggplot2} package is part of the {tidyverse} meta-package.
- _x000D_
  
  A
  _x000D_
  
  FALSE
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  TRUE
  _x000D_
Correct

Incorrect
Question 5 of 16

5. Question
Which of the code segments below will NOT work to load the {ggplot2} package?
- _x000D_
  
  A
  _x000D_
  
  library(tidyverse)
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  library(ggplot)
  _x000D_
- _x000D_
  
  C
  _x000D_
  
  library(ggplot2)
  _x000D_
Correct

Incorrect
Question 6 of 16

6. Question
True or False: To properly use the ggplot() function, you need to use all 7 grammar of graphics layers (data, aesthetics, geometries, facets, statistics, coordinates and themes)
- _x000D_
  
  A
  _x000D_
  
  FALSE
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  TRUE
  _x000D_
Correct

Incorrect
Question 7 of 16

7. Question
What do we provide in the geom layer?
- _x000D_
  
  A
  _x000D_
  
  The geometrical coordinates
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  The colors that we want to use for the plotting
  _x000D_
- _x000D_
  
  C
  _x000D_
  
  The types of geometric objects to plot
  _x000D_
Correct

Incorrect
Question 8 of 16

8. Question
The scatterplot below uses the storms dataset from {dplyr} to visualize the positions and movements of hurricanes in the Unites States in the year 2005.
```
hurricanes <- storms  %>% filter(status == "hurricane", year == 2005)_x000D_
_x000D_
ggplot(data = hurricanes, _x000D_
       mapping = aes(x = long, y = lat, color = name)) + _x000D_
  geom_point()
```
Which of the options below correctly describes the aesthetic mappings of this plot?
- _x000D_
  
  A
  _x000D_
  
  The latitude variable is mapped to the x aesthetic
  _x000D_
  
  The longitude variable is mapped to y aesthetic
  _x000D_
  
  The name variable is mapped to the color aesthetic
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  The latitude aesthetic is mapped to the x axis
  _x000D_
  
  The longitude aesthetic is mapped to y axis
  _x000D_
  
  The name aesthetic is mapped to the point color
  _x000D_
Correct

Incorrect
Question 9 of 16

9. Question
The code below attempts to create a scatterplot of height against weight using the women dataset (a built-in R dataset).

The code is faulty however, and generates no plot.
```
ggplot(women, aes(x = height, y = weight)) %>% _x000D_
  geom_point()
```
Which of the options below accurately describes the issue with the code?
- _x000D_
  
  A
  _x000D_
  
  The code is missing the x and y aesthetic mappings.
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  The code uses %>% instead of + to link the layers of the ggplot.
  _x000D_
- _x000D_
  
  C
  _x000D_
  
  The code is missing the data argument to ggplot.
  _x000D_
Correct

Incorrect
Question 10 of 16

10. Question
You try to plot a graph with the following code:
```
ggplot(mapping = aes(x = height, y = weight)) +_x000D_
  geom_point()
```
but R returns an error message. What is the problem with this code?
- _x000D_
  
  A
  _x000D_
  
  No color has been defined for the plot, so all the data points are transparent.
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  No geometric layer has been defined yet.
  _x000D_
- _x000D_
  
  C
  _x000D_
  
  No dataset has been provided yet.
  _x000D_
Correct

Incorrect
Question 11 of 16

11. Question
Which of the below functions is not a geom_*() function in {ggplot2}?
- _x000D_
  
  A
  _x000D_
  
  geom_scatterplot()
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  geom_point()
  _x000D_
- _x000D_
  
  C
  _x000D_
  
  geom_line()
  _x000D_
Correct

Incorrect
Question 12 of 16

12. Question
Which of the following would you use to make all the points in a graph larger?
- _x000D_
  
  A
  _x000D_
  
  aesthetic mapping
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  statistic layering
  _x000D_
- _x000D_
  
  C
  _x000D_
  
  vector multiplication
  _x000D_
- _x000D_
  
  D
  _x000D_
  
  a fixed aesthetic
  _x000D_
Correct

Incorrect

Question 13 of 16

13. Question

Given the following code chunk,

ggplot(data= health_charts,_x000D_
  mapping = aes(x = age, y = bmi))_x000D_
+ geom_point()

which of the following would apply an aesthetic mapping to differentiate by sex?

_x000D_

A

_x000D_

ggplot(data= health_charts,_x000D_

  mapping = aes(x = age, y = bmi))_x000D_

+ geom_point(color = sex)

_x000D_

B

_x000D_

ggplot(data= health_charts,_x000D_

  mapping = aes(x = age, y = bmi, z = sex))_x000D_

+ geom_point()

_x000D_

C

_x000D_

ggplot(data= health_charts,_x000D_

  mapping = aes(x = age, y = bmi, color = sex))_x000D_

+ geom_point()

_x000D_

D

_x000D_

ggplot(data= health_charts,_x000D_

  mapping = aes(x = age, y = bmi))_x000D_

+ geom_point(sex c(male = "blue", female = "orange"))

_x000D_

Correct

Incorrect

Question 14 of 16

14. Question
Many programmers start off building a small chunk of code, testing to see if it works, and adding a bit more, seeing if it works, and building the program one step at a time._x000D_
What’s the name for this process?
- _x000D_
  
  A
  _x000D_
  
  incremental composition
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  pyramid steps
  _x000D_
- _x000D_
  
  C
  _x000D_
  
  candle dipping
  _x000D_
- _x000D_
  
  D
  _x000D_
  
  layered development
  _x000D_
Correct

Incorrect
Question 15 of 16

15. Question
This lesson recommended we put each new element on a separate line. In fact, it’s good practice to make all our code legible, not just when using ggplot()._x000D_
But why do we want legible code?
- _x000D_
  
  A
  _x000D_
  
  If we’re showing our code to someone else, it should be easy for them to read.
  _x000D_
- _x000D_
  
  B
  _x000D_
  
  Trick question, we don’t! It’s better to keep our code hidden to confuse our enemies.
  _x000D_
- _x000D_
  
  C
  _x000D_
  
  If we need to come back and change our code, or debug it, this makes the different parts easier to see.
  _x000D_
- _x000D_
  
  D
  _x000D_
  
  We want legible code for both our own sake as well as anyone else reading it.
  _x000D_
Correct

Incorrect

Question 16 of 16

16. Question

ONLY ONE of the code chunks shown will plot the scatter plot seen, using the women dataset in R. Which code chunk has the correct syntax?

(Hint: women is a built-in R dataset, so you can test these on your computer)

_x000D_

A

_x000D_

ggplot(data = women, _x000D_

       mapping = aes(x = height, _x000D_

                     y = weight) + _x000D_

  geom_point()

_x000D_

B

_x000D_

ggplot(data = women, _x000D_

       mapping = aes(x = height, _x000D_

                     y = weight)) %>% _x000D_

  geom_point()

_x000D_

C

_x000D_

ggplot(data = women, _x000D_

       mapping = aes(y = height,_x000D_

                     x = weight)) + _x000D_

  geom_point()

_x000D_

D

_x000D_

ggplot(data = women, _x000D_

       mapping = aes(x = height, _x000D_

                     y = weight) + _x000D_

  geom_point

_x000D_

E

_x000D_

ggplot(data = women, _x000D_

       mapping = aes(x = height, _x000D_

                     y = weight) + _x000D_

  geom_point()

_x000D_

Correct

Incorrect

MCQ gg intro test

Quiz Summary

Information

Results

Results

Categories

1. Question

A

B

2. Question

A

B

C

D

3. Question

A

B

C

D

4. Question

A

B

5. Question

A

B

C

6. Question

A

B

7. Question

A

B

C

8. Question

A

B

9. Question

A

B

C

10. Question

A

B

C

11. Question

A

B

C

12. Question

A

B

C

D

13. Question

A

B

C

D

14. Question

A

B

C

D

15. Question

A

B

C

D

16. Question

A

B

C

D

E