1. Welcome
Ms. Navarro

2. Composition Book No fuss or frills needed Yes, composition not spiral!
Yes. Will be graded – Keep neat

3. Standard Deviation
Standard deviation- a Statistical analysis that is a measure of how much the data in the experiment varies
Represented by Sigma σ

4. ST. Dev Formula (Population)

5. ST. Dev Formula (sample)

6. Standard Error
The greater the variance the greater the probability of error

7. Sample Problem (Step 1) Determine your data.
How many hours of sleep do you get on a weekend night?
Student
Number of Hours 1. 2. 3. 4. 5.

8. Sample Problem (Step 2)
Determine the Mean
Mean = Average

9. Sample Problem (Step 3) Determine Variance Student Number of Hours (x)
(𝐱− 𝑥 ) 1. 2. 3. 4. 5.

10. Sample Problem (Step 4) Find the square root of variance DONE!
Now we need to Plot everything!