Chapter 4 - Measures of Central Tendency Flashcards
Frequency Distribution
Table that organizes a set of scores
X
Value of a score (raw score)
f
Frequency of scores
N
Total number of scores
∑ f X
The sum (total value) of scores
Mode
Score that occurs most frequently
Median
Midpoint in distribution
Mean
Average
Symmetrical Distribution
Mean, median and mode are equal in value
Positively Skewed Distribution
The tail of the distribution follows the positive values along the X-axis of the distribution (towards the higher numbers on the X-axis). The median falls right to the mode and the mean falls even further to the right of the median.
In positively skewed distribution, the median falls _______ of the mode and the mean falls even further to the _____ of the median.
Right
Negatively Skewed Distribution
The tail of distribution follows the zero point of the X-axis (toward the negative values on the axis). The order of the measures of central tendency is reversed from that in a positively skewed curve. The median falls to the left of hte mode and the mean falls even further to the left, past the median.
In negatively skewed distribution, the median falls to the _____ of the mode and the mean falls even further to the _____, past the median.
Left