Histograms and Circle Graphs

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, where the data is divided into intervals (bins) and the frequency of data points in each interval is represented by the height of the bars.

Front

How do you determine the height of a bar in a histogram?

Back

The height of a bar in a histogram represents the frequency of data points within the corresponding interval. Count the number of data points that fall within the interval to find the height.

Front

What is a circle graph (pie chart)?

Back

A circle graph, or pie chart, is a circular statistical graphic divided into slices to illustrate numerical proportions. Each slice represents a category's contribution to the total.

Front

How do you calculate the percentage represented by a slice in a circle graph?

Back

To calculate the percentage represented by a slice, divide the value of the slice by the total value of all slices and multiply by 100.

Front

What is the purpose of using a stem-and-leaf plot?

Back

A stem-and-leaf plot is used to display quantitative data in a way that retains the original data values while showing the shape of the distribution.

Front

How can you find the number of students in a specific range using a histogram?

Back

To find the number of students in a specific range using a histogram, locate the bar that corresponds to that range and read the height of the bar, which indicates the frequency.

Front

What does the x-axis represent in a histogram?

Back

The x-axis in a histogram represents the intervals (bins) of the data, showing the range of values.

Front

What does the y-axis represent in a histogram?

Back

The y-axis in a histogram represents the frequency of data points within each interval.

Front

How do you convert a frequency to a percentage in a histogram?

Back

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

Front

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

Back

A histogram is used for continuous data and shows frequency distributions, while a bar graph is used for categorical data and compares different categories.