What Is A Relative Frequency Histogram
Descriptive Statistics> How to create a relative histogramContent (click to skip that): Read: what is a relative histogram
What is relative frequency?
Contents
Relative frequency is how often something happens divided by all possible outcomes. The relative frequency formula is:Watch a video explaining how to create a relative histogram: Can’t watch the video? Click here.
Example
For example, you play a computer game 50 times with your friend, Sol. You have won 15 times, Sol has won 30 times and you have drawn 5 times. So far, Sol has won 30 of the 50 games. You can write it as a fraction, as 30/50 = 3/5. The relative frequency of Sol wins is 3/5.You can use relative frequency to estimate the probability that Sol will win in the future (probability is 3/5). Back to top
Tabulator
Read more: What is VSync and when should you use it? The relative frequency table shows how often something happens relative to other things. For example, the following table shows how often books are sold at a particular bookstore. In other words, it shows you How many books have been sold?: Price Frequency $1 to $10 100 $11 to $20 160 $21 to $30 100 Over $30 40 This table shows the same data. A second column has been added for relative frequency. For example, books priced between $1 and $10 represent 0.25 (25%) of total sales. Price Frequency Relative Frequency $1 to $10 100.25 $11 to $20 160.40 $21 to $30 100.25 Over $30 40.25 Back to top
Relative frequency graph
The usual chart for the above data will show the number of books sold. For example, the first column shows 100 books that were sold at the lowest price group (up to $10). The relative frequency histogram will show the relative frequency of the books sold. For example, this chart shows that the first category accounts for 25% of all book sales.
What is the exact relative histogram?
A relative frequency chart is a type of chart that shows how often something happens, in percentages. The following relative frequency chart shows book sales for a given day. The prices of categories (“bins”) are on the horizontal axis (x-axis) and relative frequencies (percentage of the population) are displayed in the vertical column (y-axis). 
Relative histograms are similar to pie charts, in that they show percentages of a population. Total number of books sold in the chart above = .25 (25%) + .4 (40%) + .25 (25%) + .10 (10%) = 1 (100%). Here is the pie chart that corresponds to the relative frequency chart above: 
How to create a relative histogram: Steps
In these steps, I’ll show you how to use a histogram to summarize your data. This is optional but it will really help you keep track of your data so your charts are accurate! Step 1: Make a histogram of your data. A histogram is just a list of how many times something has happened. For the relative histogram above, that would be the number of books sold for each price: Number of Price Ranges Sold $5-10 75 $11-15 120 $16-20 75 $21- $25 30 Read more: Logitech G502 Proteus Core and Fabric G240 Gaming Mouse Gaming Mousepad Review Step 2: Count the total number of items. For the sample problem, 75 + 120 + 75 + 30 = 300 books were sold. Step 3: Find the relative frequency by dividing the number in each category by the total. 75/300 = .25 120/300 = .40 75/300 = .25 30/300 = .10 Add this information to a new column in your relative frequency chart. Price range Number of Solds $5-10 75.25 $11-15 120.40 $16-20 75.25 $21-$25 30.10Step 4: Create a chart with information from your histogram . You can just sketch it out by hand – place the relative frequencies on the vertical axis and the price on the horizontal axis (See: How to make a chart). However, you can also use technology. See: How to create a chart in Excel.
That’s it! Back to the top Check out our YouTube channel for more stats help and tips! –Need help with a homework or test question? With The Chegg Study, you can get step-by-step solutions to your questions from an expert in the field. Your first 30 minutes with a Chegg tutor is free!Comment? Need to post a fix? Please post a comment on ours Facebook page.Read more: Elements of 420 | Top Q&A
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