Q:

What is a histogram useful for?

A:

Quick Answer

Histograms are useful in pictorial representations of data distributions. The histogram is a type of bar graph, where bar height or length represents the frequency of occurrence of a continuous distribution of data classes.

Know More

Full Answer

Histograms show basic information about the data set, such as the median data value, the width of spread and the overall distribution of the quality being displayed. Histograms can be used to assess the current state of a system, compare this state with historical data and make inferences about how the system is likely to evolve.

Histograms can be created directly from discrete data or from continuous data by first sorting this data into bins. Bins are regular intervals representing different ranges for the class of data being plotted. Dividing ages between 30 and 50 into sequential intervals of five years is an example of bins.

The individual values that satisfy the criteria of the bin are called scores. The scores of values for each bin are tallied. Values that fall right at the edge between two bins are consistently rounded up or down. Plotting bin values against the frequency of their occurrence in the form of bars gives the histogram. The bars of a histogram represent continuous data, so there should be no gaps between them.

Learn more about Data Graphs

Related Questions

  • Q:

    What is dimensional analysis?

    A:

    Dimensional analysis is a method that uses conversion factors to move from one unit of measurement to another. This is because multiplying any number by 1 doesn't change its value. An example is calculating the amount of seconds in a day, done by multiplying one day by the conversion factor 24 hours and again by the factor 60 minutes and again by the factor 60 seconds.

    Full Answer >
    Filed Under:
  • 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.

    Full Answer >
    Filed Under:
  • Q:

    What are the advantages and disadvantages of organizing data with tables and graphs?

    A:

    The advantages of using tables and graphs to organize data include easy visualization of statistics, poignant descriptions of data, the provision of a summary of the overall work and the interest people show to graphics over words, according to Texas A&M University. Disadvantages include the technical precision, time and funding resources necessary to create tables and graphs.

    Full Answer >
    Filed Under:
  • Q:

    How do you read crane load charts?

    A:

    Read a crane load chart by first looking at the top axis. The first number on the top axis is the gross vehicle weight. In the other two columns, you will find arrows that indicate the weight load for each axle,which depends on what additional accessories are loaded. Use this information to determine lift capacity, lift range, lift angle and crane in motion weight limits.

    Full Answer >
    Filed Under:

Explore