Crowdly

count has a length of 3

count is a variable containing missing observations

count would be stored as a character vector in R

count is a mixed variable that contains numerical values and character values

count is a factor variable because it contains NA values

This question is about workflow and reproducibility. Your project as saved in ETC1010_5510.Rproj is in the folder ETC1010_5510 (which indicates that the location where R is looking at is folder ETC1010_5510). In that folder you have carefully organised your assignment work into a separate directory, which holds your solution, in the file assignment_01.Rmd. The directory structure is below:

users
  └── myself
      └──  ETC1010_5510
            └── ETC1010_5510.Rproj
            └── assignment
                └── assignment_01.Rmd
                └── assignment_02.Rmd
                └── data
                    └── file.csv

What would happen if you tried to run the following code after you opened the project read_csv("assignment/data/file.csv")?

You will get an error suggesting you move your Rmd file

It will run but produce a warning that the data is in a different folder than expected

You will get a file not found error

It will run perfectly because the files are nicely organised

This will produce a message letting you know that you should use the here package

How does semi_join work?

It keeps observations in a data set x that have a match in a data set y and returns just the columns from the data set x.

It keeps observations in a data set y that have a match in a data set x and returns just the columns from the data set x.

It keeps observations in a data set x that have a match in a data set y and returns just the columns from the data set y.

What is the difference between the left_join() and the

right_join()?

Select the correct answer

right_join() prioritizes the right data set while left_join() prioritizes the left data set

right_join() prioritizes the left data set while left_join() prioritizes the right data set

There is no difference

True or False?

“Keys” are variables used to connected records from one table to another.

True or False?

The "inner_join()" function will return all rows from x where there are matching values in y and all columns from x and y

Animated plots should always be used as it it the best type of graph

The facet_wrap command allow us to present multiple subplots to display subsets of our data

I will use R projects from now on.

Yes

100%

This answer is incorrect. Yes is the correct answer. If you click this you get 0. So I suggest you click Yes.

The facet_grid command allows us to present plots combining two variables