MATM Midterm Lesson 2 Flashcards
enable you to know how
different the data or observations are, whether there are
outliers in the distribution, or whether the values are very
close to each other. It is also called the measure of
degree of scatteredness.
Measures of variation
If the __________ __ _________ is zero, there is no variation
at all and that the data are all alike, or homogeneous.
Otherwise, they are heterogenous.
Measures of variation
is the entire group of individuals or elements a researcher wanted to study
Population
a subgroup of the population that represents the entirety of it.
Sample
is the simplest form of measuring the variation of a distribution.
Range
is the distance or difference between highest data and lowest data
Range
R=H-L
Range = Highest - Lowest
is the average absolute distance between each data/observation and the mean
Mean Absolute Deviation
(MAD)
|X| (modulus of X) is its non-non-
negative value.negative value.
absolute value of a number
it measures the dispersion of a set of data points around their mean.
Variance
there are two variances which are the population variance and sample variance
Variance
is simply the square root of the variance.
Standard Deviation
It is used when we want to measure the spread of values in a data set.
Standard Deviation
A standard deviation close to zero indicates that data points are very
close to the mean, whereas a larger standard deviation indicates that
data points are spread further away from the mean.
Standard Deviation
