Intro

Question 1

Statistics

Answer 1

The science of data

Question 2

Data Analysis

Answer 2

The process of organizing, displaying, summarizing, and asking questions about data

Question 3

Individuals

Answer 3

Objects (people, animals, things) described by a set of data

Question 4

Variable

Answer 4

Any characteristic of an individual

Question 5

Categorical variables

Answer 5

Places an individual into one of several groups or categories

Question 6

Quantitative variable

Answer 6

Takes numerical values for which it makes sense to find an average

Question 7

Bar Graph

Answer 7

Compare several quantities by comparing heights of bars they represent those quantities

Question 8

2-way-table

Answer 8

Describes two categorical variables, organizing counts according to a row variable and a column variable

Question 9

Maraginal Distirbution

Answer 9

Distribution of values of that variable among all individuals described by the table

Question 10

Conditional Distribution

Answer 10

Describes the values of that variable among individuals who have a specific value of another variable

Question 11

Association

Answer 11

If knowing the value of one variable helps predict the value of the other

Question 12

Right skew

Answer 12

Right side of graph is longer (tail is pulling longer to right

Question 13

Left Skew

Answer 13

Left side is longer (tail is pulling towards the left

Question 14

Skew

Answer 14

Tends to have a longer “tail” on one side

Question 15

Symmetry

Answer 15

Right and left sides approximately mirror images

Question 16

Humps/Bumps

Answer 16

0 Modes= uniform
1 Modes= unimodal
2 Modes= bimodal
3+ Modes= Multimodal

Question 17

Symmetric Distribution

Answer 17

• Mean and median are the same
• uses mean
• Mean Formula:
  (X1 + X2 + X3 + ….+ Xn) / n

Question 18

Skewed Distribution

Answer 18

• Mean is pulled towards skewness

- Uses median

Question 19

Resistant

Answer 19

When a characteristic of details not effected by extreme observations, goes unchanged

• Median is resistant
• Mean is NOT resistant

Question 20

Median

Answer 20

Mid point of distant

-50% above & 50% below

Question 21

Outliers

Answer 21

Individual values that fall outside the overall pattern of the distribution
* Rule of Thumb*
~Q1 - 1.5(1QR)
~Q3 + 1.5(1QR)

Question 22

Gaps

Answer 22

Areas of distribution where there are no observations

Question 23

Cluster

Answer 23

Location where groups of data are located