Histograms Flashcard

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within specified ranges (bins).

Front

What is the purpose of using intervals (bins) in a histogram?

Back

Intervals (bins) group data points into ranges, allowing for a clearer visualization of the distribution and frequency of the data.

Front

How do you determine the appropriate number of bins for a histogram?

Back

The appropriate number of bins can be determined using the square root of the number of data points or Sturges' formula, which is 1 + 3.322 log(n), where n is the number of data points.

Front

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

Back

The height of a bar in a histogram represents the frequency (count) of data points that fall within the corresponding interval.

Front

How can you interpret the shape of a histogram?

Back

The shape of a histogram can indicate the distribution of data, such as normal, skewed, or uniform distributions.

Front

What is the difference between a histogram and a bar graph?

Back

A histogram displays continuous data and uses adjacent bars, while a bar graph displays categorical data with spaces between bars.

Front

What is the significance of the x-axis in a histogram?

Back

The x-axis represents the intervals (bins) of the data, showing the range of values for which frequencies are being measured.

Front

What is the significance of the y-axis in a histogram?

Back

The y-axis represents the frequency of data points within each interval (bin) of the histogram.

Front

How do you calculate the percentage of data points in a specific interval of a histogram?

Back

To calculate the percentage, divide the frequency of the interval by the total number of data points and multiply by 100.

Front

What does it mean if a histogram is skewed to the right?

Back

A right-skewed histogram indicates that most data points are concentrated on the left, with a few larger values extending to the right.