chapter 2 main ideas Flashcards
1
Q
relative frequency
A
the proprotion of the total N made up by a scores simple frequency
2
Q
cumulative frequency
A
the sum of all the frequencies of all scores at or below a particular score
3
Q
what are frequency distributions
A
graphs to display frequency info
4
Q
what graph should you use to display frequency for interval and ratio data?
A
histogram and frequency polygon
5
Q
what graph should you use for nominal and ordinal data?
A
bar graph
6
Q
when are pie graphs used?
A
sometimes nominal data with only a few values
7
Q
Do samples look like their parent population?
A
yes if the sample is large enough and multiple samples from the population will look alike
