Data Graphs

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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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  • 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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  • 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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  • 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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  • 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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  • 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 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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  • 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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  • 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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  • 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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  • 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 analyze data?

    A: Data analysis is conducted by gathering, processing, inspecting, cleaning, transforming and modeling data. There are a variety of tools that are important for modeling data, including both graphical and quantitative techniques. All data analysis requires a strong understanding of mathematical statistics.
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  • What is geodetic surveying?

    Q: What is geodetic surveying?

    A: Geodetic surveying is a specific type of surveying that takes the curvature of the Earth into account. These surveys cover large areas of land and provide high levels of accuracy.
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  • Q: What are the advantages of breadth-first search?

    A: If the information being sought is close to the root of where the search begins, breadth-first searching will be faster than depth-first searching. However, the total speed depends on how the information is stored.
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  • Q: How do you make a tape diagram?

    A: A tape diagram is a visual way to solve word problems in mathematics, and the way to make one is to draw colored blocks to represent the quantities in the word problem. Redrawing the colored blocks an appropriate number of times makes it easier to solve the word problem.
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  • What is a compound bar graph?

    Q: What is a compound bar graph?

    A: A compound bar graph breaks down data by splitting the columns to represent information comprising each bar. For example, a bar graph representing state employment rates can be turned into a compound bar graph by subdividing each state bar into columns to show unemployment percentages based on gender or race.
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  • Q: What is a stem and leaves graph?

    A: A stem and leaves graph, also known as a stem and leaf plot, is a special table used in mathematics. Within a stem and leaves graph, each data value is split into a stem, which is the first digit or digits, and a leaf, which is usually the last digit.
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  • Q: What is a cumulative frequency polygon?

    A: A cumulative frequency polygon is a plot of the cumulative frequency against the upper class boundary with the points joined by a line segment. An ogive is any continuous cumulative frequency curve, including cumulative frequency polygons. A cumulative frequency polygon displays cumulative frequency on the x-axis and class marks on the y-axis.
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  • Q: Where can I find newspaper articles with graphs?

    A: A newspaper article with a graph can be found in a number of newspapers. Anything that provides data can have a graph used in the article. Examples include economics, unemployment, and more.
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  • Q: What is a statement of scale?

    A: A statement of scale is typically used on a map. The statement of scale defines a ratio or relationship between a unit of length on the map and the piece of Earth being referenced in the map.
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  • Q: How do you read a histogram?

    A: A histogram is a graphical representation of quantitative data. It has a continuous number line on the horizontal axis that is grouped into ranges, or class intervals. The quantity for each range is displayed as different column heights.
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