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### Course: MAP Recommended Practice>Unit 52

Lesson 1: Dot plots & frequency tables

# Frequency tables & dot plots

Frequency tables and dot plots are handy tools in data representation. Frequency tables show how often each value appears, while dot plots provide a visual depiction of this information. These tools can be used to answer various questions about the data.

## Want to join the conversation?

• why dose math have so many different words that all meen the same thing!
• Don't blame it on math. Words are English language and in English we have many words that mean the same thing. This makes it a little more challenging to translate words into math symbols.
• How to find the median on a dot plot?
• The MEDIAN is the middle number of the dot plot
if we had a list with consecutive numbers from 1 to 100 arranged from smallest to biggest the middle of the dot plot would be 50 and 51 but we want to find the middle, the MOST middle, that is why we get the middle, 50.5... that is your answer. I hope that helps :D
• How does one determine the typical number? Is it the same as the average?
• because htere are certain things in the tipical avrege
(1 vote)
• Why are there so many different types of plots? Such as histograms, box plots, bar graphs, pie charts, etc. Can't we just use ONE type of graph?
• no because some children learn better with different charts and sometimes it is just easier in other charts
• Do you mean the median?
In order to find the median, order all the numbers from least to greatest, then count how many numbers are there. By counting them you can see which ones are in the middle because if the result is an odd number then there will be just ONE center number, and that's the median.
But if the amount is even then that means there will be TWO numbers in the middle. If there are two middle numbers, then add the two numbers together and then divide it by two. The sum of that is the median.
Sorry if this was confusing, I hope it helped! If you're still confused then let me know and I, or someone else, can try to explain it a different way.
• How do you find mean on a dot plot?
• Add up all of the numbers in the dot pot. For example, if there were 3 dots on 1, 4 dots on 2, and 3 dots on 3, you would find the average of 1, 1, 1, 2, 2, 2, 2, 3, 3, 3. I hope that helped. If it didn't, comment on this reply and I will try to help you again.
• What is a typical value of a dot plot?
• The typical value of a dot plot is the 'center' value of the dot plot. To find it, count the number of dots in the dot plot(for example, 30). Then, divide the number of dots by 2(which would be 30/2=15). Then, start counting the dots and stop at the dot which is at half of the number of the dots(which would be the 15th dot in our example). Check the value corresponding to that dot. That will give you the typical value of the dot plot. I hope that answers your question.
• Sal,could you please make a video about the typical value ?
• there are no videos on center yet(I think that is the same thing) but there are quizzes on it, that gets confusing. Maybye the video is on a lower level? I don't know why they expect us to know it though.
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