AP Stat

discrete

numbers with no decimals, integers

continuous

decimals included with the number

Histogram is best for what type of data?

Quantative, also shows general shape

Bar Graph is best for what type of data?

Categorical, through comparing distinct independent variables

stdevp is used when…

the whole population is included

When the graph is skewed left what is mean or median better to use?

median

When the graph is skewed right what is mean or median better to use?

mean

When the graph is a bell curve what is mean or median better to use?

Both can be used

Standard Deviation is greatly affected by what?

outliers

For symmetric distrubution its best to use

mean and standard deviation

For skewed or outliers its best to use

median and IQR

When adding and subtracting

shape and variability stays the same while the center changes

When multiplying or dividing

the shape of the graph stays the same, but the center and variability change