Data Graphs

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Graphs of various types provide convenient visual representations of scientific data that would otherwise be presented in intimidating blocks of text or a series of numbers. Graphs represent statistics such as changes over time, comparisons, or parts of a whole. Graphs can be used to make date more accessible to both scientists and laypersons.

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  • What is a segmented bar graph?

    Q: What is a segmented bar graph?

    A: A segmented bar graph is similar to regular bar graph except the bars are made of different segments that are represented visually through colored sections. A segmented bar graph is sometimes known as a stacked bar graph, and it offers greater detail about data sets.
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  • What is numerical data?

    Q: What is numerical data?

    A: Numerical data is data that is expressed with digits as opposed to letters or words. For example, the weight of a desk or the height of a building is numerical data.
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  • Why are points connected in a line graph but not in a bar graph?

    Q: Why are points connected in a line graph but not in a bar graph?

    A: A line graph is a graph that charts the relationship between two variables or a progression of a single quantity through time. Without the lines connecting points of data, it would be difficult to make sense of the data being presented if there was no overall trend between the dots. A bar graph, on the other hand, is meant to compare two or more statistics, such as population figures.
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  • When do you use a bar graph?

    Q: When do you use a bar graph?

    A: A bar graph is used to compare items between different groups and track changes over a period of time. Bar graphs are best used for changes that happen over a large amount of time instead of just months or weeks.
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  • How is a tally chart made?

    Q: How is a tally chart made?

    A: To make a tally chart, single lines are drawn next to one another until reaching five, where the fifth line crosses the four other lines diagonally. This is a simple charting method that can be used quickly for surveys or other needs.
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  • What are the names of graphs?

    Q: What are the names of graphs?

    A: Several types of graphs are used for displaying information in mathematics including the bar graph; pie chart or circle graph; histogram; stem and leaf plot; dot plot; scatter plot; and time-series graphs. The type of graph chosen depends on whether the data is quantitative, qualitative or paired.
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  • Why are graphs important?

    Q: Why are graphs important?

    A: Graphs are beneficial because they summarize and display information in a manner that is easy for most people to comprehend. Graphs are used in many academic disciplines, including math, hard sciences and social sciences. They make appearances in corporate settings, serving as useful tools to convey financial information and facilitate data analysis.
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  • How does a graph help people interpret scientific data?

    Q: How does a graph help people interpret scientific data?

    A: Graphs of various types provide convenient visual representations of scientific data that would otherwise be presented in intimidating blocks of text or a series of numbers. Graphs represent statistics such as changes over time, comparisons, or parts of a whole. Graphs can be used to make date more accessible to both scientists and laypersons.
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  • What is a pie graph used for?

    Q: What is a pie graph used for?

    A: A pie graph is an effective visual tool used for showing how something breaks into parts. A pie graph is essentially a circle sliced into 100 pieces. Each category or part represented in the pie graph is given a piece of the pie to represent the percentage that it comprises of the whole.
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  • How is data turned into information?

    Q: How is data turned into information?

    A: According to the BBC, data is transformed into information after being imported into a database or spreadsheet. Information is defined as a collection of facts or data, whereas data is defined as information organized for analysis or used to reason.
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  • What are the advantages and disadvantages of a graph?

    Q: What are the advantages and disadvantages of a graph?

    A: The primary advantage of using a graph or chart in a presentation is that they help the audience to visualize the point of the presentation. Graphs emphasize the main point, make the data more convincing, provide a compact way of presenting information and help audiences stay engaged. Disadvantages of graphs include being time consuming to construct and costly to produce. They also require technology that some may lack.
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  • Q: How do you graph a circle?

    A: The equation to graph a circle is written in the standard form (x - h)^2 + (y-k)^2 = r^2, where the ordered pair (h, k) is the center of the circle and r is the radius. To get the equation to this form, you may need to complete the square.
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  • Q: Is there such thing as an online graphing calculator?

    A: Desmos.com provides an online graphing calculator. It runs entirely in the browser without the need to download anything and has all the essential features of a graphing calculator.
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  • What are some pie chart advantages and disadvantages?

    Q: What are some pie chart advantages and disadvantages?

    A: Pie charts are an efficient and easy to read way to represent data in percentages or portions. However, it is sometimes difficult to include absolute numbers on a pie chart instead of percentages, particularly if there are many categories shown in the chart.
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  • Q: What is a stem and leaf plot with decimals?

    A: A stem and leaf plot with decimals is an organized representation of the frequency with which certain numbers containing decimals occur in a set of data. Stem and leaf plots can be applied in a number of different fields for bookkeeping and to help keep sets of information analyzed. There are also forms of stem and leaf plots that are charted the same way, but do not use decimals.
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  • How do you find quartiles?

    Q: How do you find quartiles?

    A: Quartiles can be discovered by arranging a set of numbers from smallest to highest and then dividing the data into separate groups. Finding the quartiles of a data set is useful for discovering trends, such as the median and range of the values given.
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  • Q: How are graphs used in the real world?

    A: In the real world, graphs are used to help people quickly understand and use information. Examples include graphs used in medicine and in business.
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  • Q: What is a continuous graph?

    A: A continuous graph is a graph that describes a space containing smoothly connected numerical values. There are no values excluded in between individual points on this graph. Continuous graphs are sometimes conflated with continuous functions, which are smoothly connected plot lines or shapes.
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  • Q: What is a blank organizational chart?

    A: A blank organizational chart is a hierarchical chart with blank spaces where the names of individuals or entities can be entered in a way that shows their relationships to other members of the hierarchy. The resulting chart illustrates how a company or organization is structured.
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  • Q: What distinguishes a histogram from a bar chart?

    A: Histograms and bar charts are different in several ways, but a major distinction is that the bars in histograms represent ranges of data, while the bars in bar charts represent categories. For example, a histogram might plot the percentage of visitors that went to a museum in 10-, 20- or 30-minute ranges. A bar chart might plot the number of visitors per category, such as the different museum exhibits.
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  • Q: What is an example of a covariance matrix?

    A: A covariance matrix is a P*P matrix with elements from a vector of random variables. The element in the position i, j is the given covariance between the ith and jth elements. The covariance matrix can also be referred to as the variance-covariance matrix or the dispersion matrix. The concept of covariance matrix enhances the general idea of variance in multiple dimensions.
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