**Contribute your data in the front**- Pick up handout and your previous lab sheet
- Open Blackboard and download SPSS instructions
- Slides at http://statr.me/courses.html
- Don't need to do #8
- You need to print off graphs for this lab

- Quantitative variable
- Takes
**numerical**values - Can have
**arithmetic**operations, such as adding and averaging - Example: age, height, temperature, etc.

- Takes
- Categorical variable
- Places an individual into one of several
**groups**or**categories** - Example: colour, major, etc.

- Places an individual into one of several

- Quantitative variable
- Histogram, Stemplot, etc.

- Categorical variable
- Bar Graph, Pie Graph, etc.

- Change variable type to
**string**for categorical variable - Two ways to enter categorical data
- Enter value sequentially as it is (Left)
- Enter summarized values and their counts (Right)

- For the second approach, remember to
**WEIGHT CASES** - Read instructions carefully

- Skewness
- Skewed left: Long
**Tail**on the left - Skewed right: Long
**Tail**on the right

- Skewed left: Long
- Modes
- Unimodal: One major peak
- Multimodal: More than one peaks