1. Statistics
An Overview

2. What is Statistics?
“People who eat three daily servings of whole grains have been shown to reduce their risk of stroke by 37%.”
“Seventy percent of the 1500 U.S. spinal cord injuries to minors result from vehicle accidents, and 68 percent of those injured were not wearing a seatbelt”

3. Even more interesting…
Being unmarried can shorten a man’s life by ten years
In New York City, approx. 1,600 people are bitten by other humans annually
The average four year-old child asks over four hundred questions daily.
1 out of 4 kids in the USA is overweight
A blink lasts approximately 0.3 seconds
Girls have more taste buds than boys

4. How do we get that??? Data Example
Consist of information coming from observations, counts, measurements, or responses
Example
How much sleep do high school students get at night?

5. Mmmm Data Population Sample
The collection of all outcomes, responses, measurements, or counts that are of interest
Sample
A part of a population

6. What do we do with data??? Statistics
Is the science of collecting, organizing, analyzing, and interpreting data in order to make decisions.

7. Lets display data Ways to display data: Scatter Plot
Histogram (Bar Graph)
Stem and Leaf Plot
Box and Whisker Plot
Pie Chart

8. Today…
Histograms
Graph groups of numbers according to how often they appear 6
1,2,2,3,3,3,3,4,4,5,6 4
Times appearing 2
1-2
3-4
5-6
Group of numbers

9. Try it out…
Class Grades:
Grade
# of Students A 5 B 8 C 3 D E 1