Data is information that is collected Qualitative attribute data refers to non numerical data Intro to Probability and Statistics Quantitative numerical data represents numerical observations It falls into two classes ID: 283774
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Slide1
i.e…“The stuff from the first bit of your book that you need to know right now.”
Data is information that is collected.
Qualitative (attribute) data refers to non – numerical data.
Intro to Probability and StatisticsSlide2
Quantitative (numerical) data represents numerical observations. It falls into two classes: Data that is counted is called discrete.
Data that is measured is called continuous.Slide3
Descriptive statistics describes data that has been collected.
2016
US Presidential Election electoral results (by state)Hillary Clinton (48.1% popular, 43% electoral)
Donald Trump (46.6% popular, 57% electoral)
(2012)Slide4
Descriptive statistics describes data that has been collected.
Hillary Clinton (48.1% popular, 43% electoral)
Donald Trump (46.6% popular, 57% electoral)
Delaware – 900,000
Wyoming – 600,000
2016
US Presidential Election electoral results (by state, weighted by po
pulation
)Slide5
Descriptive statistics describes data that has been collected.
2016
US Presidential Election electoral results (by state, weighted by number of electoral votes
)Slide6
Inferential statistics
makes predictions, based on a
random sample taken from a population. Slide7
Inferential statistics makes predictions, based on a
random sample
taken from a population. To approximate a parameter (a measure of a population) we measure a statistic (the related characteristic of a sample) with its corresponding margin of error.Slide8Slide9Slide10Slide11
How should we present our data?A company hires a statistician who samples 20 employees randomly, and records how many products each produces in one week:
10
16
19
30
17
16
35
29
15
18
21
20
26
14
18
28
30
39
19
21Slide12
Frequency Distribution Left column possible data values
Broken into equally spaced classes
Right columnfrequency of occurrence of classes
10
16
19
30
17
16
35
29
15
18
21
20
26
14
18
28
30
39
19
21Slide13
II. Frequency Histogram A picture of the frequency distribution
Visual
Displays of Information (an introduction)Slide14Slide15Slide16
https://priceonomics.com/the-mythology-of-dog-years/ Slide17Slide18Slide19
Visual Displays of Information (an introduction)
Other Types of “
Histogrammy” DisplaysPareto Diagram (or Pareto Chart)
“finger”
“refused”
“dedicated”Slide20
My father was slaughtered by a six fingered man. He was a great sword maker, my father. When the six fingered man appeared and requested a special sword, my father took the job. He slaved a year before it was done. The six fingered man returned and demanded it, but at one tenth his promised price. My father refused. Without a word, the six fingered man slashed him through the heart. I loved my father. So naturally, I challenged his murderer to a duel. I failed. The six fingered man left me alive, but he gave me these. I was eleven years old, and when I was strong enough, I dedicated my life to the study of fencing. So the next time we meet, I will not fail. I will go up to the six fingered man and say, "Hello. My name is Inigo Montoya. You killed my father. Prepare to die."Slide21
Visual Displays of Information (an introduction)Other Types of “
Histogrammy
” DisplaysStem and Leaf Plot (Stem Plot)
Dot Plot
Others?
Pareto Diagram (or Chart)
mashups…
when’s your birthday
?Slide22Slide23Slide24Slide25
Slide26Slide27
One million dollars
(100 of the previous packets)Slide28
One billion dollars
(plus a $46.7 million couch)Slide29Slide30
If you spent
$1 million every day since the birth of Jesus, you still wouldn’t have spent this much money. Slide31
If the national debt were laid in a single line of $1 bills, it would stretch from Earth, past Uranus.
"It is incumbent on every generation to pay its own debts as it goes. A principle which if acted on would save one-half the wars of the world." - Thomas Jefferson Slide32Slide33Slide34Slide35Slide36
Chris Jordan: Skull With Cigarette, 2007
...based on a painting by Van Gogh...
200,000 packs of cigarettes, equal to the number of Americans who die from cigarette smoking every six months.
www.chrisjordan.comSlide37
Visual Displays of Information (an introduction)One Last Thing...
How many keys do you have with you today?
(I’ll bring a histogram next time)
Homework for Intro To Probability and Statistics