1. Seminar 6
By Zachary H. Cohle

2. How was this data produced?
I stole it off a site: so it’s an observational study.
Is this result a sample or for an entire population?
Wrong: It’s a sample.

3. P

4. What are some sources of Bias?
The people!
Give some reasons why this data cannot be trusted.
‘Cause people are liars.

5. Center?
Spread?
Shape?

6. When talking about the spread, what jumps out at you.
Descriptive Statistics: Ages of Men
Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3
Ages of Men
Variable Maximum
Ages of Men
Descriptive Statistics: Ages of Women
Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3
Ages of Women
Variable Maximum
Ages of Women
That’s right! The StDev is higher for females; therefore their ages vary more!

7. Center?
Spread?
Shape?

8. Look at the Stem and Leaf
Is the Male’s graph skewed at all?
How ‘bout the Female’s graph?
What ages of Females are most common?
How ‘bout Males?
Are the Female numbers more spread out than the Males?

9. Finished