Data Graphs

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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  • 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 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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  • 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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  • 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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  • 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 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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  • 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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  • 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 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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  • Q: What is a stem-and-leaf plot?

    A: A stem-and-leaf plot is a method for visualizing data in which the tens digits of the data points are written in a column and the ones digits are written in rows next to them. The tens digits form the stem, and the ones digits are the leaves.
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  • What are the percentages of different eye colors?

    Q: What are the percentages of different eye colors?

    A: The percentages of people with various eye colors are unknown for many countries. However, according to the American Academy of Ophthalmology, 32 percent of Americans have blue or grey eyes; 15 percent have blue, grey or green eyes with brown or yellow flecks; 12 percent have green or light brown eyes with minimal flecks; 16 percent have brown eyes with dark specks; and 25 percent have uniformly brown eyes.
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  • Q: What is the generic competency model?

    A: A competency model is a framework that broadly defines the blueprint for ‘excellent’ performance within an organization. Usually the framework consists of a number of competencies which can be generically applied to a broad number of roles within the organization or sector for review.
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  • What is the direct variation formula?

    Q: What is the direct variation formula?

    A: The general formula for direct variation is k equals y divided by x. In this formula, k is a constant quantity and x and y are variables. K is also called the constant of variation, because it stays the same even as x and y vary.
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  • What is the purpose of a primary key in a database?

    Q: What is the purpose of a primary key in a database?

    A: Primary keys are used to uniquely identify a row in a database table; no two rows can have the same primary key. Identification numbers are often used as primary keys. Any field that is not necessarily unique, such as a person's name, is not suitable for being a primary key.
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  • Q: How do you draw a frequency polygon?

    A: A frequency polygon is a line graph that represents the shapes of the statistical distributions. To draw the graph, simply construct a histogram, and join the middle top points of the bars of the histogram with a line. You need a pencil, a ruler and a piece of paper.
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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 do you solve the traveling salesman problem?

    A: According to Joe Malkevitch of York College and the American Mathematical Society, the traveling salesman problem can be solved using algorithms. However, attempts to find a simple algorithm to answer the traveling salesman problem have failed.
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  • Q: What is an embedded chart?

    A: An embedded chart is a chart that is placed on a worksheet as opposed to on a separate chart sheet when using a spreadsheet software package. Embedded charts play an instrumental role in viewing or printing a chart or a PivotChart report using its source data or other information.
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  • Q: How do you make a schedule?

    A: Schedules of all kinds can help you lay out useful information in an organized way so that it's easier to find later. Many schedules are created according to times or days, but schedules also can be used to plot a series of steps or to track the coordinates of a graph in math.
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