What is Statistics? ?
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Transcript of What is Statistics? ?
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What is Statistics??
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Is it this????
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Is it this????
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Is it this????
Two trains are traveling toward each other on the same track, each at 60 miles per hour. When they are exactly 120 miles apart, a fly takes off from the front of one of the trains, flying toward the other train……….
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Is it this????
Two trains are traveling toward each other on the same track, each at 60 miles per hour. When they are exactly 120 miles apart, a fly takes off from the front of one of the trains, flying toward the other train……….
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Statistics is all about data.
No….Not that D
ata
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Data is a collection of Information
The Information could be in the form of
NUMBERS
CATEGORIES
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NUMBERS
Weight
Salary
Facebook Friends
Cell phone minutes
Time spent in traffic
Number of Tweets
Cholesterol Level
Cost of Haircut
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CATEGORIES
Favorite movie
Male/FemalePolitical Affiliation
Pepsi/Coca Cola Drinker
Type of car you driveiPhone owner or not
Mac/PC User
Tattooed or not
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In part, Statistics is displaying data
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Or…..more creativelyBlue – Twitter PostsOrange - Flickr postsWhite - Both
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Or…..more creatively
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Minutes Per Day Delayed in Traffic
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Statistics also uses data to answer questions
What does the average Golden Retriever puppy weigh?
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What percentage of teenagers have tattoos?
If the Presidential election was held today, what percent of voters would vote for the candidate that you support?
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To answer these questions data are collected from a small sample
Some teenagers
All teenagers
and used to represent a much larger group.
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Statistics tells us how to select the sample
and how accurate the results will be.
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Statistics is also used to make decisions
Can Astrology really predict personality traits?
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Can dogs be trained to detect lung cancer from smelling a person’s breath?
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In statistics, we learn how to design experiments that are used to determine cause and effect relationships.
Can the dog really pick out someone with cancer or was the dog just lucky?
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If the dog couldn’t detect lung cancer, we would still expect him to be right some times.
.
Statistics helps us to quantify ideas like this.
How many times would the dog have to be right for us to believe he was not just lucky?
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In statistics we learn how to collect and analyze data, and then draw conclusions from
the data.