Final Exam

Question 1

Why are pie charts not preffered?

Answer 1

If you use too many pieces it can make the visualization ineffective

Question 2

Crosstab

Answer 2

like a table

Question 3

Bar Chart

Answer 3

Column based displays
-used to compare discrete or categorical data
-show categorical data

Question 4

Histogram

Answer 4

Column based displays
-frequency distribution of continuous variables
-present numerical data

Question 5

What is the purpose of bins in a histogram?

Answer 5

Choice of unit and spacing on the X-Axis

Question 6

What is a tree map

Answer 6

Multiple box map
-Display hierarchical data
-Display part to whole relationships

Question 7

Bubble charts:

Answer 7

Bubbles
-used to make comparison between members of a categorical field

Question 8

Continuous data

Answer 8

-Measurable and only numerical
-represented by line graph or histogram
-no gaps and can take any value within a range

Question 9

Discrete Data

Answer 9

-clear spaces or gaps between values
-countable and can be numeric or categorical
-represented by a bar graph

Question 10

Quantitative data

Answer 10

information that can be quantified and given a numerical value

Question 11

Sequential

Answer 11

color is ordered from low to high

Question 12

Diverging

Answer 12

two sequential colors with a neutral midpoint

Question 13

Categorical

Answer 13

contrasting colors for individual comparison

Question 14

Highlight

Answer 14

used to highlight something

Question 15

Alert

Answer 15

used to get readers attention

Question 16

4 D’s of storytelling

Answer 16

Define your story
Display the data
De clutter and remove any distracting junk
Direct your audience

Question 17

Dimensions

Answer 17

Fields within the data that are usually more discrete or categorical in nature
-contain qualitative values
-affect the level of detail
-names, dates

Question 18

Measures

Answer 18

Contain numeric quantitative values that you can measure
ex: longitude and latitude
ex: unit price and quantity

Question 19

Green field/pills

Answer 19

measures dimensions that are continuous
-continuous field values treated as an infinite range
-ex: sum(profit) or year(date)

Question 20

Blue field/pills

Answer 20

measures fields that are discrete

Question 21

Dual axis chart/Combo chart

Answer 21

a chart that has 2 different types of charts
ex: column chart + line chart

Question 22

Boolean calculations

Answer 22

True or False statements

Question 23

Quick Table Calculations

Answer 23

allows you to apply a built in calculation to your visualization

Question 24

Trend Lines / Regression

Answer 24

Used to estimate the trend or relationship between variables

Question 25

Reference Line

Answer 25

A reference line may be defined as the line based on some aggregate function which is used to draw on visualization.

Question 26

Live vs Extracted data

Answer 26

Live: live connection to your data, auto updates Extracted: compressed snapshot of your data stored locally

Question 27

Dates: discrete vs continuous

Answer 27

Continuous: Show how data changes over a range of time (line chart) Discrete: show a specific unit of time(bar graph)

Question 28

Filters vs Paramters:

Answer 28

Filters: specific to a data source Parameters: used across entire workbook

Question 29

Anscombe's Quartet

Answer 29

A set of 4 data sets that look very different when plotted, but have the same basic statisitcs

Question 30

Moire Effect

Answer 30

when two patterns with similar frequencies interact with each other. -perception of movement in a solid object

Question 31

Hermann effect

Answer 31

Similar to moire effect but instead of bars creating the illusion, it's squares

Question 32

Gestalt Effect

Answer 32

the brain's innate organizing tendencies allow us to perceive things as organized wholes rather than individual elements (pac man triangle)

Question 33

Motion

Answer 33

animated presentation of frames of data

Question 34

Medium

Answer 34

The physical strata on which data is displayd

Question 35

Context

Answer 35

The sensory and emotional environment

Question 36

Structured vs Unstructured data

Answer 36

Structured: Excel or tableau Unstructured: Book or movie

Question 37

Data lake

Answer 37

collecting and storing data in raw form

Question 38

Data aggregation

Answer 38

sorting and filtering data

Question 39

data cleaning

Answer 39

detecting and correcting corrupt or inaccurate information records from a data set

Question 40

data granularity

Answer 40

level of detail considered in a model or represented in an analysis

Question 41

Descriptive analytics

Answer 41

describe past performance and history

Question 42

Predictive analytics

Answer 42

predict future trends and patterns

Question 43

Prescriptive analytics

Answer 43

indicating the best decisions to make or course of action to take

Question 44

4 Key characteristics of big data

Answer 44

Variety: form of data (structured vs unstructured) Veracity: uncertainty of data Volume: scale/amount of data Velocity: analysis of streaming data as it travels around the internet

Question 45

Tooltip

Answer 45

show information when you hover your mouse over a datapoint in a Tableau visualization

Question 46

T/F: To create a map in Tableau, you must drag latitude and longitude to "columns" and "rows."

Answer 46

False