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Statistics

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by

Vanessa Quach

on 25 June 2013

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Transcript of Statistics

STATISTICS

Sheri Hamlin
Vanessa Quach
Josh Baltazar
Megan Malone
Bridges/Pre-MARC 2013
Purpose of Stats
Project
Validity
Conclusion
It is used to gather, organize and analyze data. This information is used to present data in research papers and make inferences about data.
Synopsis
Why this topic?
Hypothesis and Experimentation
Graphs and Equations
Scatter Plot
Bell Curve Anatomy
Z-Score
Quartiles
Standard Deviation
Relative Frequencies
What does the data mean?
Other projects?
THANK YOU!
5 Number Summary
Min = smallest number in the set
Q1= Middle number between min and Q2
Median (Q2)= the middle number of the set
Q3= Middle number between Q2 and Max
Max = largest number in the set
Standard Deviation
and Variance
Z - Score
Statistics is a branch of applied mathematics that scientists use to plan research.
Mean
Mean- average of the numbers
Variance- the average of squared differences from the mean
Standard deviation- measure of how spread out numbers are


From our Facebook survey data, we can conclude that the majority of people check their Facebook 2-3 times an hour.
Statistics...What is it?
Relative Frequency- how often something
happens divided by all outcomes.
All
frequencies
add up
to 1
Z-Score- indicates how many standard deviations an element is from the mean
Example questions used in survey:
--->
HYPOTHESIS

GATHER DATA

ANALYZE
2-3 times an hour? lets say thats 15 minutes a day
at 365 days a year
....2,190 hours .
In this time you could learn how to fly
and fly around the world 48 times.
Full transcript