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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
What to use If you want to show the relationship between two sets of data?
The answer depends on what sort of variables the data are (qualitative, quantitative-discrete, quantitative-continuous are; the nature of the relationship (if any) between the data sets; how much information you wish the graph to convey and how much you would prefer to describe in the accompanying text.
What does it mean to sort the data in a particular table?
It means to rearrange the rows (or columns) of the table so that the data in a specified column (or row) are in some order. This may be numeric increasing, decreasing, alphnumeric or other.
What are the advantages of using the histogram instead of the box plot to represent the data?
A histogram can handle data when the bars are not all of the same width. This is particularly important for data which are skewed.
Graphs act as mathematical models for real-life situations.
Graphs are in their most basic forms rough sketches of a phenomenon--they do not show perfectly the real world phenomenon, but act as an idealization.
Mathematicians must be careful to find a graph which allows them to find trends. Trends are predictions--example, the population will be 40,000 in city XYZ in year 2025. At the same time, mathematicians need to stay with the imperfection of real-world occurrences.
In sum, graphs display real world events--throwing a football, the number of deaths in 1908 versus in 2008, how fast a colony of bacteria grow--but display them in an idealized form.
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What is the name for the ranges of data in a histogram?
They are often called classes butt may have more specific names.
What information is lost when a histogram is used to represent a data distribution of a dot plot?
The main loss is the correlation, if any, between the variables. You also lose the exact value of individual data points.
What does a steep line on a line graph represent?
It represents the fact that a small change in the variable which is plotted on the horizontal axis with the given scale, is associated with a large change in the variable potted on the vertical axis with its scale.
Note that the steepness can be changed by simply increasing the scale factor on the horizontal axis or decreasing it on the vertical axis.
What intervals would you use to make a histogram?
Any intervals which are convenient to construct and also make some logical sense.
How do i get the values for a bar graph from a picture?
You look for that information on the scale. If there is no scale then dismiss the graph as being uninformative.
In a line graph where is the dependant variable plotted?
The usual way is to plot the independent variable on the horizontal, and the dependent variable on the vertical. There are some where the dependent is on the horizontal, though. Supply-Demand and Price graphs in Economics comes to mind, as an example.
What kinds of information can a histogram easily show you?
A histogram effectively displays the distribution of a dataset by illustrating the frequency of data points within specified intervals, or bins. It allows you to quickly identify patterns such as the central tendency, variability, skewness, and the presence of outliers. Additionally, histograms can reveal the shape of the data distribution, whether it's normal, bimodal, or skewed, providing insights into the underlying characteristics of the data.
Can you find the measures of center only from the histogram?
No. You can do that from a bar graph, a stem and leaf chart, a scatter plot, a cumulative frequency chart.
Would the data be better displayed on a histogram minute intervals or minute intervals?
Perhaps minute intervals might be better than minute intervals.
What is the limitation of pie chart?
A pie chart is useful for between 3 and 7 or 8 segments. With more segments it becomes difficult to use. A pie chart is useful for looking at the breakdown, into parts, of a single total. It is not very good for comparing the breakdowns of two (or more) variables: for example, budgets headings for two years. This is because many people confuse the fact that a circle of double the radius would represent a quadrupling of the total. This quadratic relationship is often used to misrepresent data.
What are the three types of graphs and what kind of information does each give out?
There are a lot more than three types of charts. The question can only be answered if you specify which three types of charts you are interested in.
What are the two ways of making a textual presentation of a table?
1-From Insert Menu choose "Insert Table".
2-From slide content choose insert Table.
Why is it better to display data in a bar chart rather than in a table?
The claim made in the question is not valid. A bar chart summarises data whereas a table is more likely to give more detailed information. So the choice between the two methods of presenting data depends on the purpose: a quick and easy impression or detailed figures.
Also, having worked as a professional statistician for over 30 years I have come across some people who can digest tabular information but cannot make head or tail of charts and there have been others who love charts but simply glaze over when presented with a table.
It is therefore important to bear in mind the purpose and the audience.
How does information on a circle graph represented?
Each segment of the circle graph represent a part of the whole.
You cannot add pie charts. You would need to get the original data, add the corresponding numbers together and generate a new chart.
