Test Bank for Learning Statistics Using R 1st Edition Schumacker

Randall E. Schumacker, Learning Statistics Using R Instructor Test Bank


Chapter 1

Multiple Choice

1. Once an R package is loaded, you can access it by issuing the following command:

a. open

*b. library

c. run

d. tools

2. To access additional R manuals and references, use the following command:

*a. help.start()

b. Rhelp()

c. full.help()

d. start.help()

3. All R commands and functions are run using what type of files?

a. Output

b. Command

*c. Script

d. Lined

4. The three basic operations that govern R usage are:

a. Input, Computing, Listing

b. Process, Analyzing, Output

c. Input, Process, Analyzing

*d. Input, Process, and Output

5. The R program assigns values to a variable by using the following function:

*a. =

b. ^

, Randall E. Schumacker, Learning Statistics Using R Instructor Test Bank


c. @

d. #

6. Data that contains more than a single value or variable is called a(n)

a. complex data set

*b. vector

c. list

d. column

7. What is printed in R when there is missing data?

a. .

*b. NA

c. 99

d. it is blank in the data file

8. A 3 X 4 matrix has how many rows?

a. 2

*b. 3

c. 4

d. 12

9. A 3 X 4 matrix has how many columns?

a. 2

b. 3

*c. 4

d. 12

10. Which R function will report the number of observations and variables in a data frame or
matrix?

a. names()