You have the following dataset in R
# A tibble: 4 × 4
id name score passed
<dbl> <chr> <dbl> <lgl>
1 101 Jane 85 TRUE
2 102 Rob 78 TRUE
3 103 Shanika 62 FALSE
4 104 George 90 TRUE
A data analyst wants to:
Rename the column score to exam_score.
Extract the exam_score column as a vector for further calculations.
Which of the following statements correctly describes how this can be done using dplyr?

Question

You have the following dataset in R

# A tibble: 4 × 4
     id name    score passed
  <dbl> <chr>   <dbl> <lgl> 
1   101 Jane       85 TRUE  
2   102 Rob        78 TRUE  
3   103 Shanika    62 FALSE 
4   104 George     90 TRUE

A data analyst wants to:

Rename the column score to exam_score.

Extract the exam_score column as a vector for further calculations.

Which of the following statements correctly describes how this can be done using dplyr?

Answer

pull(exam_score) will work only if the column was correctly renamed first.

Answer

After renaming with rename(exam_score = score), using pull(exam_score) will extract the column as a vector.

Answer

rename(score = exam_score) changes the column name from score to exam_score.

Answer

rename() can be used after pull() to change column names in a vector.

Answer

Both B and C are correct.

Crowdly

You have the following dataset in R # A tibble: 4 × 4 id name score p...

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