Creating a Relative Frequency Histogram in Excel

Install the Data Analysis Toolpak

To begin, ensure that the Data Analysis Toolpak is installed in Excel. This add-on is essential for creating frequency tables and histograms.

Prepare Your Data

Start by copying your data from FreqData.xlsx. Make sure you have the total number of data points (n) to apply the 2k rule for determining the number of classes (k), where 2k must be greater than n. The value of k must be an integer.

Set Up the Frequency Table

Identify the minimum and maximum values of your data set. Determine the starting point of the first class and the end point of the last class. Calculate the class width using the appropriate formula and establish the class start and end values.

Use the Data Analysis Toolpak

Click on the Data Tab and select Data Analysis. Choose Histogram from the Data Analysis Menu. Input the range A1:A60 to find the data, D1:D6 for the class ending values, and G1 as the Output range. Ensure the Chart Output option is selected to generate the graph.

Complete the Frequency Table

After generating the histogram, complete the frequency table by adding the cumulative frequency, relative frequency, and cumulative relative frequency columns to provide a comprehensive view of your data distribution.

Format the Histogram

Finalize your histogram by formatting it. Change the Gap Width to 0% to meet the standard for relative frequency histograms, ensuring a visually accurate representation of your data.

Common Use Cases

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  Analyzing the distribution of survey responses for market research
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  Comparing student performance across different school subjects
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  Visualizing the percentage of sales for different product categories
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  Monitoring the relative occurrence of software bugs over time
• 
  Assessing the frequency of customer visits to a store by time of day

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