Chapter 1

Question 1

Bivariate Data

Answer 1

data on each of two variables, where one value is paired with another

Question 2

Categorical Variable

Answer 2

a variable that has 2+ categories with no intrinsic ordering

Question 3

Center

Answer 3

the middle of distribution, typically found with graphical analysis or calculating the mean/median

Question 4

Conditional Distribution

Answer 4

probability distribution for sub-population or sub-category

Question 5

Data

Answer 5

facts & statistics collected together for reference or analysis

Question 6

Distribution

Answer 6

mathematical function giving the probabilities of different outcomes

Question 7

Individual

Answer 7

people or objects included in a statistical study

Question 8

Interquartile Range (IQR)

Answer 8

middle half of data that lies between upper and lower quartiles

Question 9

Marginal Distribution

Answer 9

probability distribution of variables in subset

Question 10

Mean

Answer 10

mathematical average of values

Question 11

Median

Answer 11

middle number in a sequence of numbers

Question 12

Mode

Answer 12

the value appearing the most in data sets

Question 13

Outlier

Answer 13

a point that differs significantly from the other observations

Question 14

Population

Answer 14

a set of similar items, events, or individuals drawn for a study

Question 15

Quantitative Variable

Answer 15

variables whose values are numeric as a result of counting or measuring

Question 16

First Quartile

Answer 16

the value under which 25% of data points are found when arranged in increasing order

Question 17

Third Quartile

Answer 17

the value over which 25% of data points are found when arranged in an increasing order

Question 18

Range

Answer 18

difference between largest and smallest values in a set of data

Question 19

Spread

Answer 19

measures describing how similar or varied data is from an item

Question 20

Standard Deviation

Answer 20

square root of the difference from the mean squared divided by the number of values

Question 21

Two Way Table

Answer 21

a way to display frequencies and relative frequencies for 2 variables

Question 22

Unimodal

Answer 22

probability distribution which has a single peak

Question 23

Univariate Data

Answer 23

data on only one variable

Question 24

Variance

Answer 24

standard deviation squared

Question 25

Symmetric

Answer 25

distribution in which the right & left sides mirror each other