QBA exam 1
frequency distribution
how often we get a certain number/response in our data
frequency distribution table
a table that displays the frequency for each value of a variable
percent frequency
the percentage of responses for each category
relative frequency x 100
pie chart
a way to graphically display frequency responses for a variable
bar charts
displays the frequency or relative frequency of responses of a categorical/qualitative variable
cumulative relative frequency
the relative frequency of the interval + the cumulative relative frequency of the previous interval
scatterplots
allow us to look at the interaction or relationship between 2 quantitative variables
negative relationships
as the value of one variable increases, the value of the other variable decreases
positive relationships
as the value of one variable increases, the value of the other variable also increases, or vice versa