Clustering
83, 84, 86, 89, 90, 90, 91, 95, and 99 displays what cluster?
90
What are outliers
25,29,3,32,85,33,27,28 both 3 and 85 are "outliers"
What is positive association in math
If one variable increases as the other variable increases.
What is negative Association
when the values of one variable tend to decrease as the values of the other variable increase.
What is an linear association
a statistical term used to describe a straight-line relationship between two variable
How many interactions can clusters have
Cluster items have multiple parts, or interactions
What is the formula for outliers upper fence
Q3 + 1.5(IQR)
What is a strong positive association
When ρ is +1
What are negative associations in data
If one variable increases as the other variable decreases
What is an example of linear relationships
the number of hours worked compared to the amount of money earned
What is the purpose of clustering
Cluster items have multiple parts, or interactions
What is the formula for outliers lower fence
Q1 - 1.5(IQR)
What is a positive association between 2 variables
when the values of one variable tend to increase as the values of the other variable increase.
what are negative associations in a study
What is the difference between a linear and non linear relationship
A linear relationship creates a straight line when plotted on a graph. A nonlinear relationship does not create a straight line but instead creates a curve
How do you determine the number of clusters?
set the value to about √(n/2) for a dataset of 'n' points
What is the formula for outliers in box plots?
( IQR=Q3−Q1 )
How do you know if something has a positive association
when the values of one variable tend to increase as the values of the other variable increase.
What is an example of a negative association rule
A ∧ ¬B ∧ ¬C ∧ D → E ∧ ¬F.
What is a simple linear relationship
a measure of the degree to which two variables vary together, or a measure of the intensity of the association between two variables.
What is the formula for clustering in math
Dr=nr∑i=1nr∑i′=1‖xi−xi′‖2
How many standard deviations is an outlier
greater than +3 standard deviations from the mean, or less than -3 standard deviations
What is one example positive association in math
as height increases, so does weight
What is a perfect negative association
-1.0
What is a linear equations
2x – 3 = 0
m + 1 = 0
x/2 = 3