Central Tendency and Variation Flashcards
What does central tendency imply?
there may not be a single spot that is clearly and precisely at the center of the distribution
What does the optimal procedure for finding central tendency depend on?
The shape of the distribution involved
What is mode
The most frequent score in a population
What is the mode for grouped distribution
The most frequently occurring interval
Disadvantage of mode for grouped distribution
the mode depends a good deal on the way the scores are grouped
Disadvantages of mode
- not a very reliable measure of central tendency
What is bimodal distribution?
a type of probability distribution characterized by having two distinct peaks or modes
What is the main advantage of using mode as a measure of central tendency for ratio and interval scales
You are able to distinguish between unimodal and bimodal distributions
Advantage of mode
It can be used for any kind of measurement scale
(For nominal other measures do not work)
What is the median
The score at the 50th percentile
When is the median a disadvantage for ordinal scale
having many tied scores diminishes the usefulness of an ordinal scale.
