Histograms and Scatterplots

Front

What is a histogram?

Back

A histogram is a type of bar graph that represents the frequency distribution of numerical data. Each bar represents a range of values (bins) and the height of the bar shows how many data points fall within that range.

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for two variables for a set of data. Each point on the graph represents an observation, with one variable plotted along the x-axis and the other along the y-axis.

Front

How do you determine the range of a histogram?

Back

The range of a histogram is determined by subtracting the smallest value in the data set from the largest value.

Front

What does the height of a bar in a histogram represent?

Back

The height of a bar in a histogram represents the number of data points (frequency) that fall within the range of values represented by that bar.

Front

What is the purpose of a scatterplot?

Back

The purpose of a scatterplot is to visually display the relationship between two quantitative variables, helping to identify patterns, trends, or correlations.

Front

What does a positive correlation in a scatterplot indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation in a scatterplot indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What is no correlation in a scatterplot?

Back

No correlation means there is no apparent relationship between the two variables; changes in one variable do not predict changes in the other.

Front

How can you find the frequency of a specific range in a histogram?

Back

To find the frequency of a specific range in a histogram, locate the corresponding bar and read the height of that bar.

Front

What is a bin in a histogram?

Back

A bin in a histogram is a range of values that groups data points together. Each bin has a specific width and represents a segment of the data.