Unit Test — Unit test Answers

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What is the name of the type of data that a scatterplot is used to analyze?

A
univariate data
B
bivariate data
C
trivariate data
D
quadvariate data
22
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Which scatterplot correctly represents the table of values below?Number of years collecting stampsNumber of stamps in collection210051754150312541753100

A
A graph titled Years Collecting Stamps versus Stamps in Collection has years collecting stamps on the x-axis and stamps in collection on the y-axis. Points are at (2, 100), (3, 100), (3, 125), (4, 150), (4, 175), (5, 200).
Option A
B
A graph titled Years Collecting Stamps versus Stamps in Collection has years collecting stamps on the x-axis and stamps in collection on the y-axis. Points are at (2, 100), (3, 100), (3, 150), (4, 150), (4, 175), and (5, 175).
Option B
C
A graph titled Years Collecting Stamps versus Stamps in Collection has years collecting stamps on the x-axis and stamps in collection on the y-axis. Points are at (2, 100), (3, 100), (3, 125), (4, 150), (4, 175), (5, 175).
Option C
D
A graph titled Years Collecting Stamps versus Stamps in Collection has years collecting stamps on the x-axis and stamps in collection on the y-axis. Points are at (2, 75), (3, 100), (3, 125), (4, 150), (4, 175), and (5, 175).
Option D
23

How many points should be plotted when creating a scatterplot from the table of values below?Pages in Book vs. Time Needed to ReadNumber of pages in bookTime needed to read book (hours)200181751527521225184003035026

A
5
B
6
C
11
D
12
24

A line that is used to represent the linear trend in the data is called the line of best fit. When finding the error of the line of best fit, which statement holds true?a.If the error is less than one, the line of best fit is the linear equation of the data.b.The smaller the error, the better the fit.c.If the error is greater than one, there is no correlation to the line of best fit.d.The larger the error, the better the fit.

A
A
B
B
C
C
D
D
25

Which r-value represents the most moderate correlation?

A
–0.92
B
–0.18
C
0.56
D
0.83

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