2.1 Histograms and Frequency Tables Practice

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

What is a frequency table?

Back

A frequency table is a table that displays the number of occurrences (frequency) of each value or range of values in a dataset.

Front

How do you determine the class limits for a frequency table?

Back

Class limits are determined by dividing the range of data into equal intervals. The lower limit of the first class is the smallest value, and the upper limit is the smallest value of the next class.

Front

What is the purpose of using classes in a frequency table?

Back

Classes are used to group data into intervals to simplify the analysis and visualization of large datasets.

Front

How do you calculate the number of classes for a frequency table?

Back

The number of classes can be determined using Sturges' formula: k = 1 + 3.322 log(n), where k is the number of classes and n is the number of data points.

Front

What is the difference between inclusive and exclusive class limits?

Back

Inclusive class limits include the endpoints (e.g., 0-10 includes both 0 and 10), while exclusive class limits do not include the upper endpoint (e.g., 0-10 excludes 10).

Front

How do you find the frequency of a class in a frequency table?

Back

The frequency of a class is found by counting the number of data points that fall within the class limits.

Front

What is cumulative frequency?

Back

Cumulative frequency is the running total of frequencies up to a certain class, showing the number of observations below a particular value.

Front

How do you create a histogram from a frequency table?

Back

To create a histogram, plot the class intervals on the x-axis and the corresponding frequencies on the y-axis, then draw bars for each class.

Front

What is the mode in a frequency distribution?

Back

The mode is the value or class interval that occurs most frequently in a dataset.