What is a histogram?

Question

Could someone please explain the difference between a histogram and a bar chart? It seems like they are the same thing.

Is the only difference that..
- a bar chart's bars are separated
- a historgram's bars are not seperated and have intervals

Is this true...
- if the horizontal axis says 'frequency or count' it's a histogram and not a bar graph?

Answer 1

In statistics, a histogram is a graphical display of tabulated frequencies. A histogram is the graphical version of a table which shows what proportion of cases fall into each of several or many specified categories. The categories are usually specified as nonoverlapping intervals of some variable. The categories (bars) must be adjacent.

Answer 2

Histogram is a bar graph of a frequency distribution in which the widths of the bars are proportional to the classes into which the variable has been divided and the heights of the bars are proportional to the class frequencies.

Bar graph is a graph consisting of parallel, usually vertical bars or rectangles with lengths proportional to the frequency with which specified quantities occur in a set of data.

The different between a bar graph and a histogram is that in a bar-chart, the classification variables are usually nominal or ordinal scale while histograms are typically constructed for interval or ratio scaled variables.

Answer 3

Come on buddy just enter this word in the google and hit search If you feel lazy. Here is the info In statistics, a histogram is a graphical display of tabulated frequencies. A histogram is the graphical version of a table that shows what proportion of cases fall into each of several or many specified categories. The histogram differs from a bar chart in that it is the area of the bar that denotes the value, not the height, a crucial distinction when the categories are not of uniform width (Lancaster, 1974). The categories are usually specified as non-overlapping intervals of some variable. The categories (bars) must be adjacent

Answer 4

In statistics, a histogram is a graphical display of tabulated frequencies. A histogram is the graphical version of a table which shows what proportion of cases fall into each of several or many specified categories. The categories are usually specified as nonoverlapping intervals of some variable. The categories (bars) must be adjacent.

The histogram is one of the seven basic tools of quality control, which include the histogram, Pareto chart, check sheet, control chart, cause-and-effect diagram, flowchart, and scatter diagram. See also Quality Management Glossary.

Answer 5

histogram is a bar graph of a frequency distribution in which the widths of the bars are proportional to the classes into which the variable has been divided and the heights of the bars are proportional to the class frequencies.

BAR CHAT is style of chart used by some technical analysts, on which, as illustrated below, the top of the vertical line indicates the highest price a security traded at during the day, and the bottom represents the lowest price. The closing price is displayed on the right side of the bar, and the opening price is shown on the left side of the bar. A single bar like the one below represents one day of trading.

Answer 6

A histogram usually uses dots to display the frequency of each outcome and has a fraction of one as the y scale. The more dots in a line, the more frequent the occurence. Adding up all the possible values times their frequency will give you one. The bar chart uses bar length and has absolute numbers as a y scale. Adding up all hte possible occurences times the number of times they occur will be some random number. They're similar, but histograms focus more on things being relative to each other.

But remember, if the y-scale is a frequency (like .05 or .01), then you're looking at a histogram. If the y-scale is an abolute number with units, then you're looking at a bar chart.

Answer 7

Well, bar chart can be separate too, but one thing you got it right, histogram always contains intervals.

Answer 8

try theis link it should explain alot http://en.wikipedia.org/wiki/Histograms

but i think your right
good luck