Piano Style Assessment

Left Hand Exercise and Short Quiz Piano Style Assessment

This is a one-question survey style quiz. There are no right or wrong answers.
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Question 1 of 5

1. Question
1. What would be the output of the following code for vector ‘v’:
```
 v[2:7] 
```
- The second term through the seventh term
- The data in the second row and seventh column
- The second term and the seventh term
- The terms with numbers ‘2’ and ‘7'
Correct

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Question 2 of 5

2. Question
2. Which piece of code will retrieve only the third column of a matrix called ‘m’?
- ```
 m[, 3] 
```
- ```
 m[3, ] 
```
- ```
 m[3, 3] 
```
- ```
 m[[, 3]] 
```
Correct

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Question 3 of 5

3. Question
3. Why do we use ‘==‘ instead of ‘=‘ to pull the day shift data?
- We are not defining a variable, we are telling R what data to select
- We need to define the data as a variable
- We need to indicate that the data is in column form, not row form
- We need to reformat the data as a vector
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Question 4 of 5

4. Question
5. Fill in the blank below
- In order to select specific values from our crime data, we first need to tell R that the
  
  data we want to use is in a format.
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Question 5 of 5

5. Question
4. Why does it make sense to separate the code in multiple steps?
Select all that apply
- To follow the code more easily
- To decrease the chance of making mistakes
- To make the code shorter
- To make the code longer and more complex
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