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Dot Plot vs. Bar graph/ Histogram

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Anya Justin

on 18 April 2013

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Transcript of Dot Plot vs. Bar graph/ Histogram

Why? Dot Plot Line Plot A.K.A dot plot Who? 1. Students How? 1. Draw a straight line Check your understanding Draw a line plot or a bar graph for the following set of data. Anya S. Justin Things to think about:- When? 2. Put all of the labels What? Displays data on a number line
Marked with an X or a dot vs. Bar graphs/ Histograms What is a dot plot/line plot?
What is a bar graph?
What is a histogram?
When do you use a dot plot/line plot?
When do you use a bar graph?
When do you use a histogram?
What is the difference between a bar graph and a histogram? Dot Plot Bar graph/Histogram Mainly used for small sets of data Alternative to a bar graph, but with few values. Example: - Graph displaying data using bars Bar graph : - displays specific categories Example: Histograms : - graphed in ranges Example: Dot Plot Bar Chart/ Histogram Use when you have small sets of data Use when you have many numbers in your data use when you have a wide range of data used to show frequency of data Bar Graphs/ Histogram This chart would be used because... This graph would be used because,,, a) It is very simple and easy to understand. b) You can extract much information from it by just briefly glancing at it because of its few data values a) It is much more detailed that a dot plot b) More complex and packed with more information about the data categories 3. Graph the data Line Plot Bar Graph 2.Surveyors 3. Scientists 4. Statistician Can be used to show comparison and frequencies Bars are touching Now you try! Based on this dot chart, answer the following question 1. What is the mean median, mode and range of this graph?

Round to the nearest whole numbers Based on this histogram and bar graph, answer the following questions 1. What is wrong with this bar graph? Histogram Bar Graph Dot Plot mean: 6
median: 5
mode: no mode
range: 8 The labels and the title is missing 2. What are the intervals on the x axis of the histogram They are intervals of 5 starting from 60 How many anaconda are there? http://www.statcan.gc.ca/edu/power-pouvoir/ch9/bargraph-diagrammeabarres/5214818-eng.htm 6,9,2,5,3,4,6,5,2,6,5,5,3,2,8 Data: 6,9,2,5,3,4,6,5,2,6,5,5,3,2,8
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