wk 5 Flashcards
Measures of central tendency
describes the middle point of a data set.
descriptive statistics because they describe the data
Categorical data
Binary
nominal
ordinal
The mean
most common
uses uses all scores in the set
the median
middle value of the dates are on the schools are closed in numerical order from lowest to highest
The mode
The value which appears most frequently in a dataset.
BiModal = two modes
multimodal = more than 2 modes
Measures of dispersion
The spread of the data.
can only be calculated on continuous data
The minima and the Maxima
The lowest and highest values in a dataset
the range
the highest value minus the lowest value
variance
The amount of spread in a given data set.
calculated by examining the degree to which a person score differs from the group mean
Standard deviation
Measure of spread related to the mean.
calculated by square routing variants
