Statistical Analysis in Psychology Flashcards
1
Q
Measure of Central Tendency
A
- summarizing data using a single score that represents whole set of scores
-mode: most frequently occurring score
- mean: average of scores all together
- skewed: scores that lack symmetry around average value
- helps know similarity of diversity in data
2
Q
Variation
A
- range: difference between highest and lowest scores
- standard deviation: how much scores vary around the mean score
3
Q
Correlation Coefficient
A
- statistical relationship between two things
- -1.0 to +1.0, the stronger the correlation
4
Q
Frequency Distribution
A
- mostly used with histograms, measure and describe characteristics of groups
- Normal: “bell curve” most common, symmetrical, continuous distribution, no gaps between values
- Bimodal: outcome of 2 distributions shown together in one set of data (2 modes), two centers of values
- Positive Skew: tail gets lower on right, mean + median > mode
- Negative Skew: tail is lower on left, rises up, mean + median < mode
5
Q
Descriptive Statistics
A
- numerical data measures characteristics of group
6
Q
Inferential Statistics
A
- numerical data to infer from sample data about something true in population
7
Q
Informed Consent
A
giving enough info to allow participant to decide to participate
8
Q
Debriefing
A
post experimental, explaining study and deceptions
9
Q
Normal curve
A
most scores fall to mean
10
Q
Statistical Significance
A
how likely it is to obtain results occurred by chance
