1. Statistics & Probability
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2. Statistics
Statistics is the study of the collection, analysis, interpretation, presentation, and organization of data.
Statistical Questions - A statistical question is one that can be answered by collecting data and where there will be variability in that data.
1. How many days are in March? 2. How old is your dog? 3. On average, how old are the dogs that live on this street? 4. What proportion of the students at your school like watermelons? 5. What was the highest temperature today at City Hall?

3. What Is Data? Data is information. An example:
In my sixth grade class we took a pizza lovers survey.
We learned that ten kids liked pepperoni pizza best.
Nine kids liked sausage pizza best.
Seven kids liked cheese pizza best.
This information is called DATA.
What is data?
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4. The data from the test will help us cure your disease.
How Do People Use Data?
The data from the test will help us cure your disease.
We use data to make money.
Data is needed to build things.

5. We Use Graphs to Organize Data.
I know my parents will want to talk to my Language Arts teacher.

6. Graphs Make Data Easier to Understand.
Below is data without a graph.
Animals on the farm
Chickens rule!
Cows
124
Chickens
450
Turkeys
388
Horses 56
Mules
110

7. Data WITH A Graph. Cows 124 Chickens 450 Turkeys 388 Horses 56 Mules
110

8. Let’s Learn About Graphs.
There are many different types of graphs.
Let’s learn about two kinds.
The bar graph
2. The line graph

9. Different Types of Graphs Can Show the Same Data.
Awesome! These graphs show the same data!
Bar Graph
Line Graph

10. Check Out the Bar Graph.
Y axis
X axis

11. Check Out the Line Graph.
Y axis
X axis

12. Learn More About Bar Graphs.

13. Which bar on the graph represents 45 feet?
A Challenge.
Feet

14. Another Challenge
Feet

15. Let’s Test Your Skills. Graph A Graph B 3rd grade 4th grade 5th grade
At Elm Street School students have computer class once a week. The chart shows the number of minutes each class spends in the computer lab.
Class
3rd grade
4th grade
5th grade
6th grade
Number of minutes 25 30 35 45
Which is the most appropriate graph of the information shown in the chart?
Graph A
Graph B

16. Mean, Median, Mode, Range
Mean - the "average" you're used to, where you add up all the numbers and then divide by the number of numbers.
Median - the "middle" value in the list of numbers. (rewrite your list in numerical order first)
Mode - is the value that occurs most often. If no number is repeated, then there is no mode for the list.
Range - is just the difference between the largest and smallest values.

17. Mean, Median, Mode, Range
Find the mean, median, mode, and range for the following list of values:
13, 18, 13, 14, 13, 16, 14, 21, 13

18. Graphing list numbers Stem and Leaf Plots Consider the following
5, 12, 8, 32, 30, 49, 48

19. YOUR TURN!
Work with a partner or group of 3 to design a question you can survey the class. It needs to begin with: How many students in 6-2 ________?
Design your question
Gather your information
Find the mean, median, mode and range for your data
Record you date in the following ways
Bar Graph
Line Graph
Stem and Leaf Plot

20. Probability
The extent to which something is probable; the likelihood of something happening or being the case
How do we find probability?
FRACTIONS! We look at the number of outcomes that are possible divided by the total number of outcomes possible
So what are the chances of getting a red marble if there are 5 red marbles out of a total of 15 marbles in the bag?
5/15 = 1/3 or 33% chance

21. Probability Tossing a Coin
When a coin is tossed, there are 2 possible outcomes(denominator)
The probability of the coin landing H is ½. 50% chance
The probability of the coin landing T is ½. 50% chance
Throwing Dice 
There are six possible outcomes on a single die : 1, 2, 3, 4, 5, 6.
The probability of any one of them is 1/6. (17% chance