Ch 9 Test: Data Analysis and Displays

Front

What is a line of best fit?

Back

A line that best represents the data on a scatter plot, showing the trend of the data points.

Front

How do you determine the total number of surveyed students from a data display?

Back

By summing the values represented in the data display or reading the total directly if indicated.

Front

What is a histogram?

Back

A type of data display that uses bars to show the frequency of data within certain ranges.

Front

Why is it important for the y-axis to start at 0 in a graph?

Back

Starting at 0 provides a true representation of the data and avoids misleading interpretations.

Front

What are outliers in a data set?

Back

Data points that are significantly different from the rest of the data, often lying outside the overall pattern.

Front

What is a gap in a data set?

Back

A range of values where no data points exist, indicating a break in the data.

Front

What is a cluster in a data set?

Back

A group of data points that are close together, indicating a concentration of values.

Front

What is the purpose of a scatter plot?

Back

To display the relationship between two quantitative variables.

Front

How can you identify misleading graphs?

Back

By checking for inconsistent intervals on axes, lack of context, or selective data presentation.

Front

What is the difference between a pie chart and a bar graph?

Back

A pie chart shows parts of a whole as slices, while a bar graph compares different categories using bars.