Definitions
What is a cluster?
A tight grouping of data points
A graph that starts low and ends higher is what type of correlation?
Positive correlation
SUV Sedan Total
Electric 15 25 40
Gas 45 15 60
How many chose Sedan?
40 people
In a negative correlation, when x increases what does y do?
True or False: Does Mrs. Mordini-Perez own 5 pairs of converse?
False!
What is an outlier ?
A data point far away from the rest of the data points
A graph that starts higher and ends lower is what type of correlation?
Negative correlation
SUV Sedan Total
Electric 15 25 40
Gas 45 15 60
If Pete was going to get a SUV what type would you predict he would get? Why?
Gas because majority of people who picked SUV got gas.
In this data set, which point is an outlier?
(1,47)
(2,52)
(2,50)
(5,10)
(5,10)
How many different states did Mrs. Mordini-Perez live in?
3
f you divide every entry in a two-way table by the grand total of all participants surveyed, you create this specific type of table
Relative frequency
What correlation does a graph have when the point is all over and seems to have nothing alike?
No correlation
SUV Sedan Total
Electric 15 25 40
Gas 45 15 60
What is the relative frequency of getting a Gas Sedan?
15% [15/100]
A scatterplot correlates adult males' height vs. shoe size. What does the point (72,13) on the scatterplot represent?
A man is 72 inches and size 13 in shoes.
How many years has Mrs. Mordini-Perez taught ?
11 years
What shows the general relationship or trend between two variables on a scatter plot?
Line of best fit
True or False?
A scatter plot can have more than two variables.
True
Coffee Tea Total
Morning 50 20 70
Evening 10 [X]
Total 60 110
What is the total for tea?
50
What represents a positive association in a scatterplot?
as x increases, so does y.
How many children does Mrs. Mordini-Perez have?
1
What is two-way frequency table?
Shows frequencies from two categorical or qualitative variables
What does a scatter plot tell you about the two variables?
The correlation between the two.
Coffee Tea Total
Morning 50 20 70
Evening 10 [X]
Total 60 110
How many people drank tea in the evening?
30
In a no-correlation graph, when x increases what does y do?
Trick question! Nothing because there is no correlation in the graph.
How many siblings does Mrs.Mordini-Perez have?
3