Grouped Frequency Distribution

range

uses this bc its unreasonable to list all the indiv scores in a frequency distribution

rvalsinte

to obtain a relatively simple and organized picture of the data, one can group scores into _______

10 intervals

recommended number of class intervals

interval width

distance from lower and upper boundaries for the class interval

lost

wider class intervals = more information is ____

intervals

if continuous variable measured, this is the corresponding resulting measurement on the number line rather than single points

apparent limits

appears that they form the upper and lower boundaries for the class interval

relative frequencies & smooth curves

graphs for population distribution < (2&)

stem & leaf display

this display requires that each score be separated into 2 parts < (2&)

stem & leaf display

display that provides a simple alternative to a grouped frequency distribution table or graph

stem

stem&leaf:

1st digit

leaf

stem&leaf:

last digit

stem

stem&leaf:

8 of 85

leaf

stem&leaf:

5 of 85

stem & leaf display

similar to a grouped frequency

stem & leaf display

allows researchers to identify every individual score in the data