Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
|
frequency distrubtion
|
the number of x in each category of analyzed data
|
|
|
proportion
|
f=#of cases in a category and n=total # of cases
f/n (f divided by n) |
|
|
percentage
|
100*proportion
|
|
|
ratio
|
f subset 1=frequency in any category
f subset 2=frequency in any other category f subset 1 over f subset 2 |
|
|
rate
|
1000 (usually) times actual cases over potential cases
|
|
|
rate of change
|
100 (time 2-time1 divided by time 1)
|
|
|
grouped frequency distrubution
|
condensing scores into smaller categories or groups
|
|
|
upper limit
|
the highest real number in a category
|
|
|
lower limit
|
the lowest real number in a category
|
|
|
apparent real number
|
the lowest and highest whole number in a category
|
|
|
real number
|
the lowest and highest number rounded to .5 in a category
|
|
|
midpoint
|
the middlemost score value in the class interval
lowest score value + highest score value divided by 2 |
|
|
cumalitive frequencies
|
cf
the total number of cases having any given score or a score that is lower |
|
|
cumalitve percentage
|
c%
the percentage of cases having any score or a score that is lower (100) cf divided by n |
|
|
percentile ranks
|
c% + [(x-l) divided by i] x % of value
x-value given l-lower limit of set critical iinterval i-class interval width %-% of scores that fall n critical interval |
|
|
cross tabulation
|
a table that presents the distribution of one variable across the categories of one or more additional variables
|
|
|
calculating cross tabulation scores
|
add the frequencies from both categories of the columns (second categorization) to get n
|
|
|
row marginals
|
from cross tabulation tables the rows on the margins
the percentages/frequincies from the columns (second categorization |
|
|
bar graph vs. histogram
|
bar graphs are typically used to dislpay the frequency/percentage distribution of a discrete variable, but histograms display continous measures especially at the interval level
and may be connected from |
|
|
frequency polygon
|
tends to stress continuity along a scale
useful for ordinal and interval data may be connected by a straight line from point to point |
|
|
kurtosis
|
peakedness
|
|
|
leptokurtic
|
the peak
|
|
|
platykurtic
|
flat peaks
|
|
|
mesokurtic
|
not really tall or really flat peak
|
|
|
negatively skewed
|
skewed to the left
tail on the left is much longer than tail on the right |
|
|
positively skewed
|
skewed to the right
tail on the right much longer than the right |
|
|
symmmetrical skew
|
tails on the left and the right the same or very close
|
