1. PHS AP Psychology
Credit Todd Daniel of Great Ideas in Psychology Podcast (available on Itunes U) for the idea of starting a Psychology class like this.
Descriptive Statistics: Scales of Measurement Measures of Central Tendency

3. Essential Questions
EQ 1-5: How do psychologists draw appropriate conclusions about behavior from research?

4. Statistical Reasoning
Statistical procedures analyze and interpret data and let us see what the unaided eye misses.
OBJECTIVE 15| Explain the importance of statistical principles, and give an example of their use in daily life.
Composition of ethnicity in urban locales

5. Describing Data
Meaningful description of data is important in research. Misrepresentation can lead to incorrect conclusions.
OBJECTIVE 16| Explain how graphs can misrepresent data.

6. Gender Operational definition is simply either male or female.
This is nominal or naming scale
Men are in category 1, and women are in category 2.
Other Examples: Jersey Numbers, Eye Color, Shirt Color
All you are allowed to do is name.

7. Attraction
Many of you used a Likert Scale (Not attracted, Somewhat Attracted, Very Attracted.)
This is an Ordinal or ordering scale
You rank things
Does not tell you how much more attracted you are.
Other Examples: Where you finish in a race, if a person ranks their favorite ice cream
All you can do is greater than or less than operations.

8. 1 2 3 4

9. Personality or Intelligence
Administer a personality or intelligence test
This is an Interval scale
Tells us how many equal size units one thing lies above or below another.
No zero, so you can’t tell how many times bigger, smaller etc.
Other Examples: Temperature
All you can do is add and subtract

10. Mastery of Unit 1 Our Unit One Exam This is a Ratio Scale
Equal distance between values and a zero.
Other Examples: Height, Weight, Snowfall
You can multiply and Divide

11. Avatar (2009)$2,768,562,778
Titanic (1997)$1,835,300,000
The Lord of the Rings: The Return of the King (2003)$1,129,219,252
Pirates of the Caribbean: Dead Man's Chest (2006)$1,060,332,6285.
Toy Story 3 (2010)$1,031,376,037
Alice in Wonderland (2010)$1,023,285,206
The Dark Knight (2008)$1,001,921,825
Harry Potter and the Sorcerer's Stone (2001)$968,657,891
Pirates of the Caribbean: At World's End (2007)$958,404,152
Harry Potter and the Order of the Phoenix (2007) $937,000,866

12. Ratio Interval Ordinal Nominal 4 3 2 1 Scale Level
Scale of Measurement
Scale Qualities
Example(s) 4
Ratio
Magnitude
Equal Intervals
Absolute Zero
Age, Height, Weight, Percentage 3
Interval
Temperature 2
Ordinal
Likert Scale(Agree/Disagree)
Anything rank ordered 1
Nominal
None
Names, Lists of words, Jersey Numbers

13. Central Tendency
Tendency of scores to congregate around some middle variable
A measure of central tendency identifies what is average or typical in a data set

14. Measures of Central Tendency
Mode: The most frequently occurring score in a distribution.
Mean: The arithmetic average of scores in a distribution obtained by adding the scores and then dividing by their number.
Median: The middle score in a rank-ordered distribution.
OBJECTIVE 17| Describe three measures of central tendency and tell which is most affected by extreme scores.

16. But the mean doesn’t work in a skewed distribution
The Median is much better

17. Negatively Skewed
                
Positively Skewed

18. Essential Questions
EQ 1-5: How do psychologists draw appropriate conclusions about behavior from research?