Lab quiz 1

Question 1

Define a vector

Answer 1

A one dimensional array of the same mode, e.g. a set of numbers (1,2,3,)

Question 2

Define a matrix

Answer 2

A two-dimensional array of the same mode, e.g. a grid of numbers

Question 3

Define a list

Answer 3

A collection of vectors of differing modes and lengths

Question 4

Define a data frame

Answer 4

A matrix with list capabilites, e.g. an excel sheet

Question 5

What does the mode of an object indicate?

Answer 5

What kinds of elements it contains

Question 6

Define an integer

Answer 6

Any positive or negative whole number

Question 7

Define numerical data

Answer 7

Continuous, quantitative values, e.g. pi, -56.7, 3.33

Question 8

Define a character

Answer 8

Data that consists of a string of letters e.g. Lauren

Question 9

Define a factor

Answer 9

Discrete values with clear groups/levels, e.g. sheltered/exposed

Question 10

Define logial elements

Answer 10

Binary data, usually true/false - presence or absence data

Question 11

Define an operator

Answer 11

A symbol with a pre-defined purpose in base R

Question 12

What is this operator: <-

Answer 12

Assignment operator

Question 13

Define a function

Answer 13

A command built into R that carries out one or several pre-determined mathematical or statistical operations

Question 14

What does CSV stand for?

Answer 14

Comma separated values