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 calculate cumulative frequency?

Back

Cumulative frequency is calculated by adding the frequency of each class interval to the sum of the frequencies of all previous class intervals.

Front

What is class width in a frequency table?

Back

Class width is the difference between the upper and lower boundaries of a class interval. For example, in the class interval 5-10, the class width is 10 - 5 = 5.

Front

What is relative frequency?

Back

Relative frequency is the ratio of the frequency of a particular class to the total number of observations, often expressed as a percentage.

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How do you find the total frequency from a frequency table?

Back

The total frequency is found by summing all the frequencies listed in the frequency table.

Front

What does it mean if a class interval has a frequency of 400?

Back

It means that there are 400 observations (or data points) that fall within that specific class interval.

Front

How do you interpret a histogram?

Back

To interpret a histogram, look at the height of the bars to understand the frequency of data points in each interval, and observe the shape of the distribution (e.g., normal, skewed, bimodal).

Front

What is the purpose of using a frequency table?

Back

A frequency table organizes data to make it easier to understand and analyze the distribution of values within a dataset.

Front

How can you determine the number of observations below a certain value using a cumulative frequency table?

Back

You can find the number of observations below a certain value by looking at the cumulative frequency for the class interval that includes that value.