Chapter 2 3 & 4 Flashcards
-an organized tabulation of the number of individuals
located in each category on the scale of measurement.
Frequency Distribution
-tt is possible to draw a vertical line through
the middle so that one side of the distribution is a mirror image of the other
Symmetrical Distribution
-the scores tend to pile up toward one end of the scale
and taper off gradually at the other end
Skewed Distribution
The section where the scores taper off
Tail of the distribution
-A skewed distribution with the tail on the right-hand side
Positively Skewed
If the tail points to the left
negatively skewed
the number of times the value occurs in the data.
frequency (f)
the pattern of frequencies, meaning the set of all possible values and the frequencies associated with these values.
distribution
-show either the actual number of observations falling in each range or the percentage of observations.
Frequency distributions
the sum of all values divided by the number of values
arithmetic mean
which is the middle value when all values are arranged in increasing order
Median
which is the most typical value, the one that appears the most often in the data set.
Mode
The best way to summarize a data set with a single value is to find the most representative value, the one that indicates where the centre of the distribution is
central tendency
The three most commonly used measures of central tendency ar
Mean
Median
Mode
which is the difference between the highest value and the smallest value
Range
