Presentation is loading. Please wait.

Presentation is loading. Please wait.

IB Psychology Today’s Agenda: Turn in:

Similar presentations


Presentation on theme: "IB Psychology Today’s Agenda: Turn in:"— Presentation transcript:

1 IB Psychology 11.27.17 Today’s Agenda: Turn in:
Nothing Take out: Notes, notes, notes Today’s Learning Objectives: I can collect useful statistics to explain my Internal Assessment. Today’s Agenda: What you should expect to collect & work with…STATISTICS! Work Day… HW: Reading for the week Criterion B, C, & D due Friday by EOC

2 Discreet vs. Continuous Data
Discreet: Cannot be divided…only occurs in certain values (a guitar, a correct answer, school attended, yes/no, etc.) Continuous: can be divided infinitely, has no other distinct value (best example: TIME) You can usually tell the difference between discrete and continuous data because: Discreet is typically COUNTED Continuous is typically MEASURED

3 Levels of Measurement Nominal—sounds like “Name” non-numeric, or numbers can be ordered in any fashion…discreet data Ex: Students that ate breakfast, jersey numbers on athletes, gender, race, etc. Ordinal—sounds like “Order” the order matters but the differences do not matter Ex: Grades—we know an “A” is better than “D” but do we really know how much better? Rating Scales, order of finishing a race, etc. Interval—The distance between two things: the order and differences between levels of a variable matter, but they are not in a ratio Ex: temperature, time, etc. Ratio—the numbers tell us how much of one thing we have in comparison to another thing. Ex: a score of 75% compared to 50%, Three times as fast, etc.

4 Descriptive Statistics:
Summarizing Data: Central Tendency (or Groups’ “Middle Values”) Mean Median Mode Variation (or Summary of Differences Within Groups) Range Interquartile Range Variance Standard Deviation WATS: Calculate ALL, Pick ONE: be able to justify your use of the central tendency… WATS: Calculate ALL (?), Pick ONE: be able to justify your use of the variation… Most likely…

5 Descriptive Statistics:
Which should you use??? Calculate ALL, Pick ONE: be able to justify your use of the central tendency… Calculate ALL (?), Pick ONE: be able to justify your use of the variation…SD most likely

6 Formula for “Standard Deviation of a Sample”


Download ppt "IB Psychology Today’s Agenda: Turn in:"

Similar presentations


Ads by Google