Understanding Scatterplots

What does a scatterplot display?

• A relationship between two variables

• A single data point

• A bar graph comparison

• A sequence of events.

What does a positive correlation look like on a scatterplot?

• Points sloping downward from left to right

• Points forming a horizontal line

• Points scattered randomly

• Points sloping upward from left to right

Which of the following best describes a negative correlation?

• Both variables increase together

• One variable increases while the other decreases

• The variables are not related

• The variables remain constant

A study shows students who study more hours tend to earn higher test scores. What type of correlation does this suggest?

• Positive correlation

• Negative correlation

• No correlation

• Constant correlation

What does it mean if there is no correlation in a scatterplot?

• The points form a downward trend

• The points cluster in groups

• The points appear randomly scattered

• The points align in a straight line

Which of the following describes an outlier in a scatterplot?

• A point perfectly aligned with the pattern

• A point far from the general trend

• The highest value on the graph

• A point within a dense cluster

How can you recognize a negative correlation?

• The points trend upward from left to right

• The points show no clear pattern

• The points are all identical

• The points trend downward from left to right

What is the purpose of identifying clusters in scatterplots?

• To find incorrect data points

• To identify groups with similar values

• To determine causation

• To remove unnecessary data

A study finds a positive correlation between time spent exercising and test scores. What does this mean?

• Test scores decrease as exercise time increases

• Exercise time and test scores are unrelated

• Test scores increase as exercise time increases

• The study was incorrect.

A scatterplot shows points tightly clustered around an upward-sloping line. What does this indicate?

• A strong negative correlation

• A strong positive correlation

• No relationship between variables

• An outlier