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HistogramsPractise drawing and reading information from histograms displaying grouped data |
This is level 1: show the height of one bar in an almost-complete histogram with fixed class intervals. You can earn a trophy if you get at least 4 questions correct and you do this activity online.
InstructionsTry your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help. When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file. |
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Go MathsLearning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths page is an alphabetical list of free activities designed for students in Secondary/High school. Maths MapAre you looking for something specific? An exercise to supplement the topic you are studying at school at the moment perhaps. Navigate using our Maths Map to find exercises, puzzles and Maths lesson starters grouped by topic. | ||
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Reading Graphs and Charts - Answer real-life problems from different types of graphs and charts including piece-wise linear graphs.
Level 1 - Show the height of one bar in an almost-complete histogram with fixed class intervals
Level 2 - Read information from histograms with fixed class intervals
Level 3 - Complete a frequency table with information from a histogram with unequal class intervals
Level 4 - Complete a frequency table with information from a histogram showing frequency density
Level 5 - General questions about histograms with varying class widths
Exam Style Questions - A collection of problems in the style of GCSE or IB/A-level exam paper questions (worked solutions are available for Transum subscribers).
More on this topic including lesson Starters, visual aids, investigations and self-marking exercises.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
See the National Curriculum page for links to related online activities and resources.
Histograms are similar to bar charts but there is one important difference. It is the area of the bars in a histogram that is proportional to the frequency rather than the height.
The first couple of levels of this exercise features histograms with equal class widths which means the heights of the bars can be conveniently used to find the frequency.
Levels 3 onwards contain histograms with unequal class widths so the vertical axis can be thought of as the frequency density.
Frequency = Frequency density × Class Width
Histograms can be used to represent both discrete and continuous data but they are typically used for displaying continuous data.
To draw a histogram, the data first needs to be assigned to a number of different groups (classes or bins). There are various theories concerning how many of these groups there should be but the normal is between five and twenty depending on the amount of data. A number of consecutive groups containing very little data may be merged into a single group.
Qwfp at English Wikipedia [CC BY-SA 3.0], via Wikimedia Commons
Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can double-click the 'Check' button to make it float at the bottom of your screen.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
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Ella Chandler, England
Saturday, December 11, 2021
"Level 1 and 2 of the 'Histogram' activity are incorrect, they show and ask questions about bar charts but refer to them as histograms when the y-axis is clearly labelled frequency, not frequency density. This is a shame as I find these activities very useful with my students and am sad to not have an activity I can with them for this topic.
[Transum: Thank you for your feedback Ella. The definitions of a histogram that I have read do not stipulate that the y-axis should represent frequency density unless the groups (bins) are not all the same width.]"