what is statistics? ?
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What is Statistics? ?. Is it this????. Is it this????. 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………. - PowerPoint PPT PresentationTRANSCRIPT
What is Statistics??
Is it this????
Is it this????
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……….
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……….
Statistics is all about data.
No….Not that D
ata
Data is a collection of Information
The Information could be in the form of
NUMBERS
CATEGORIES
NUMBERS
Weight
Salary
Facebook Friends
Cell phone minutes
Time spent in traffic
Number of Tweets
Cholesterol Level
Cost of Haircut
CATEGORIES
Favorite movie
Male/FemalePolitical Affiliation
Pepsi/Coca Cola Drinker
Type of car you driveiPhone owner or not
Mac/PC User
Tattooed or not
In part, Statistics is displaying data
Or…..more creativelyBlue – Twitter PostsOrange - Flickr postsWhite - Both
Or…..more creatively
Minutes Per Day Delayed in Traffic
Statistics also uses data to answer questions
What does the average Golden Retriever puppy weigh?
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?
To answer these questions data are collected from a small sample
Some teenagers
All teenagers
and used to represent a much larger group.
Statistics tells us how to select the sample
and how accurate the results will be.
Statistics is also used to make decisions
Can Astrology really predict personality traits?
Can dogs be trained to detect lung cancer from smelling a person’s breath?
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?
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?
In statistics we learn how to collect and analyze data, and then draw conclusions from
the data.