Analyzing Scatter Plots and Trend Lines

What is a scatter plot primarily used for?

• To compare categories of data

• To analyze patterns and relationships in data

• To display data in a time sequence

• To plot data on a pie chart

In the context of scatter plots, what does the term 'independent variable' refer to?

• The variable that is eliminated

• The variable that is measured

• The variable that remains constant

• The variable that is manipulated

What does a positive correlation in a scatter plot indicate?

• The data points are randomly dispersed

• There is no relationship between the variables

• As one variable increases, the other decreases

• As one variable increases, the other also increases

Which type of correlation is represented by data sets that move in opposite directions?

• Positive correlation

• Mixed correlation

• Negative correlation

• No correlation

What does 'no correlation' in a scatter plot mean?

• There is no discernible pattern between the variables

• The variables increase together

• The variables are not numeric

• The variables decrease together

How is a trend line useful in a scatter plot?

• It predicts exact future values

• It helps in making educated predictions about data trends

• It shows the boundary of data points

• It separates positive from negative values

What can be inferred if the trend line in a scatter plot is very steep?

• The data points are not reliable

• The independent variable has no impact on the dependent variable

• The relationship between variables is very strong

• The variables are weakly correlated

What is typically the first step in creating a trend line in a scatter plot?

• Selecting the type of correlation

• Drawing the line through as many points as possible

• Identifying the independent variable

• Estimating the central point of data

What does it mean if a trend line has an equal number of points above and below it?

• It means the data is non-variable

• It indicates a strong correlation

• The line is incorrectly drawn

• It suggests a balanced and accurate representation of the data trend

What is the likely relationship between height and femur length based on a scatter plot analysis?

• Cannot be determined from a scatter plot

• Positive correlation

• Negative correlation

• No correlation