Lesson 2

Question 1

categorical variables

Answer 1

types of data organizations accomplished via qualitative labels rather than numerical values

Question 2

bar graph

Answer 2

type of visual representation of data organized into vertical rectangles, or bars, shown on a plane defined by an x- axis and a y-axis

Question 3

pie chart

Answer 3

type of visual representation of data organized by percentages of the whole, shown as “slices” of “pie”

Question 4

univariate data

Answer 4

a set of data that concerns one variable

Question 5

dot plot

Answer 5

type of visual representation of data organized into a series of dots shown on axes

Question 6

bivariate data

Answer 6

a set of data that concerns the relationships between two variables

Question 7

scatterplot

Answer 7

type of visual representation of data where points are plotted on a plane defined by an x-axis and a y-axis

Question 8

direction

Answer 8

the overall trend of the data, usually either positive (slanting up) or negative (slanting down)

Question 9

positive linear association

Answer 9

as regards a bivariate data set, a description of the relationship of two data points sets in which an increase in one causes an increase in the other

Question 10

negative linear association

Answer 10

as regards a bivariate data set, a description of the relationship of two data points sets in which an increase in one causes a decrease in the other

Question 11

strength

Answer 11

as regards a bivariate data set, the relative intensity of the relationship between the two variables

Question 12

line plot

Answer 12

type of visual representation of data where the points on a scatterplot are linked by line segments to more clearly show the trend