3. Means and SD Flashcards
What are the three measures of central tendency? (Methods1 means/SD)
- Mode
- Median
- Mean
What is the mode? (Methods1 means/SD)
The most frequent score in a set of results
What is the median? (Methods1 means/SD)
When scores are arranged in order according to size, the median is either;
1) the middle number
2) the average point of both scores
What is the mean? (Methods1 means/SD)
Add all the scores together and divide by the total number of scores
What does central tendency measure? (Methods1 means/SD)
Averages
What are the two measures of dispersion? (Methods1 means/SD)
1) Range
2) Standard deviation
What does dispersion measure? (Methods1 means/SD)
The spread of scores
What is the range? (Methods1 means/SD)
Difference between the highest and lowest score
What is the standard deviation? (Methods1 means/SD)
The average difference of scores from the mean
What is the standard error of the mean? (Methods1 means/SD)
The standard deviation of a set of sample means
What does the standard error show? (Methods1 means/SD)
Variation within a set of sample means
What does increasing the sample do? (Methods1 means/SD)
Reduces the standard error
