Histograms

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 (intervals).

Front

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

Back

The height of a bar in a histogram represents the frequency (number of occurrences) of data points within that interval.

Front

What is an interval in the context of a histogram?

Back

An interval is a range of numbers that groups data points together for analysis.

Front

How do you determine the number of data points in a specific interval from a histogram?

Back

You count the height of the bar corresponding to that interval, which indicates the number of data points.

Front

What is the purpose of using histograms?

Back

Histograms are used to visualize the distribution of data, making it easier to identify patterns, trends, and outliers.

Front

How can you tell which interval has the most data points in a histogram?

Back

The interval with the tallest bar has the most data points.

Front

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

Back

A histogram displays continuous data and groups it into intervals, while a bar graph displays categorical data with separate bars.

Front

If a histogram has intervals of 10-20, 20-30, and 30-40, what does the interval 20-30 represent?

Back

The interval 20-30 represents all data points that fall between 20 and 30, including 20 but not including 30.

Front

How do you find the total number of data points represented in a histogram?

Back

You sum the heights of all the bars in the histogram.

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.