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Graphs
Graphs often collect a set of data in a group of people. There are many kinds of graphs: pie charts (circle charts), bar graphs, line graphs, data tables, pictographs, flow charts, histograms, etc.
2,316 Questions
Is there a situation when a graph is not appropriate?
Yes. When the person for whom the statistical analyses is carried out is someone who cannot easlly take in information in visual form.
Why do scientists display data in graphs?
Graphs are a convenient way to display relationships between variables.
What the difference between histogram and a bar graph?
A bar graph cannot have classes with different width. The height of a bar graph represents the frequency attributed to that class whereas in a histogram the area of a "bar" is proportional to the frequency, the height represents the frequency density.
How can you tell whether a histogram has an outliner?
If the border of each column in a histogram has a clearly marked outline then it has an outliner.
When building a line-graph a person would place the what on the x-axis?
If one of the variables was independent or if there was a causal relationship between the two variables, then that variable would be placed on the x-axis. If there were no independent variable but one of them was discrete then that would usually be on the x-axis. Otherwise, any variable could be placed on the x-axis.
A barplot is another term for a bar chart, a graph in the form of boxes of different heights, with each box representing a different value or category of data.
What is the difference between a bar graph and a histogram?
What is the difference between a bar graph and a histogram?
There are two differences, one is in the type of data that is presented and the other in the way they are drawn.
In bar graphs are usually used to display "categorical data", that is data that fits into categories. For example suppose that I offered to buy donuts for six people and three said they wanted chocolate covered, 2 said plain and one said with icing sugar. I would present this in a bar garph as:
Histograms on the other hand are usually used to present "continuous data", that is data that represents measured quantity where, at least in theory, the numbers can take on any value in a certain range. A good example is weight. If you measure the weights of a group of adults you might get and numbers between say 90 pounds and 240 pounds. We usually report our weights as pounds or to the nearest half pound but we might do so to the nearest tenth of a pound or however acurate the scale is. The data would then be collected into categories to present a histogram. For example:
might be a histogram for heights (with the appropriate scale on the vertical axis). Here the data has been collected into categories of width 30 pounds.The difference in the way that bar graphs and histograms are drawn is that the bars in bar graphs are usually separated where in histograms the bars are adjacent to each other. This is not always true however. Sometimes you see bar graphs with no spaces between the bars but histograms are never drawn with spaces between the bars.
What does a straight line tells you on a line graph?
It tells you that the two variables in the graph change together at the same rate. There may or may not be a causal relationship between the tw variables: both could be related to a third variable which is not part of the graph.
What the importance of bars in bar graphs?
They are essential by definition. It is not possible to have a bar graph with no bars!
What is a drawing that tells information like a graph?
It is not clear what the question is about but I suspect that the answer you are looking for is a PICTOGRAM.
How does a line with a zero axis look on a graph?
It is not possible to answer the questions since there is no such thing as a zero axis.
Is a pie chart is used to compare parts to a whole quantity?
Yes. A pie chart is used to visually compare the parts of the whole.
Could you use a circle graph to show dad about how body mass changes?
No. A circle graph can be used for showing the relationship between a variable and its component parts. It is not suitable for illustrating changes over time.
What are ways a circle graph could be misleading?
Here are two main ways:
Represent a single circle graph as a 3-D image. If there are two sectors of the same size, with one at the front of the graph and other at the back, then because of the way in which the brain interprets distance, the sector at the back is judged as being bigger than the one in front.
If two (or more) graphs are used to show changes in the composition of different totals: for example populations within age-bands in two countries it is normal to select the sizes (areas) of the circles to represent the totals. However, most people are unable to visually convert a circle with a radius which is 1.42 (approx) times as large as representing a doubling of the area.
What do pie chart line graph and bar graph have in common?
They are ways in which data can be presented visually.
How is a bar graph and dot plots similar?
A dot plot is similar to a bar graph because they both can give you the same amount of pets and other things that you might use them for.
How is a bar graph and dot plots different?
They are different because It is easier to see the amount of the subject you are using on a bar graph than a dot plot because you can get the answer faster and more quickly.
