**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.