### Chap 16 Data Handling: Histograms - Comparing with Bar Charts

Below are 2 examples of Bar Charts.
Let's compare Histograms and Bar charts...
• What difference do you observe?
• When do you use a bar chart and when would you use a histogram?

1. I would use histograms when my x axis has to be numbers and not words
I would use histograms when i have to use frequency

2. I use a bar chart when I need words on the x axis.
I use a histogram when I need numbers on the x axis.
I also use a histogram to save paper! Haha

3. Histogram is used to present frequency counts or relative frequencies of the data, when the frequency of occurrence is important.
Bar Graph is used to discrete data like how many types of vehicles were made in a year.

4. I observe that the frequency count is on the y-axis and cannot be written horizontally while bar charts can be written horizontally. I would use a histogram when there is frequencies

5. Histograms are used for giving a comparison between frequencies. Bar graphs are used for comparing time and the amount of a object.

I use a histogram when I am calculating frequency. I use a bar chart when I am counting the number of things at different times

6. a histogram has small frequencies where as the bar graph can range from big values to small values.
The main question a histogram answers is: "How many measurements are there in each of the classes of measurements?" The main question a bar graph answers is: "What is the measurement for each item?"(retrieved from: http://www.shodor.org/interactivate/discussions/HistogramsVsBarGraph/ on 4 may at 7.50pm)

7. HIstograms are used for when we need to use our frequency tables. Bar graphs are used to count different things at the same time.

I will use a histogram when I have frequency tables. I will use a bar chart when I am counting or comparing different things at the same time.

8. Histograms are used to illustrate continuous data while bar charts are used to describe distinct categories. Histograms are also used when numbers are on the X axis.

9. What difference do you observe?
When do you use a bar chart and when would you use a histogram?

Histogram is usually used to show frequency but for pie chart, it can be used to show a variety of data. So I will use histogram to show frequency & pie chart for other data.

10. A histogram is a vertical bar with no space in between the bars.

I will use a histogram when I need an alternative method of showing data apart from frequency tables.

I will use a bar chart I am displaying data which needs comparison.

11. We use bar charts when we want to present something in a categorical method, e.g Y axis-income per month, X axis-companies, e.g ABC Company, XYZ Company.

We use histograms when we want to present something in a quantitative way, example: Y axis-income per month, X axis-range of age group, e.g 40-45, 45-50.

12. We can use bar charts when there are specific distinctive categories which requires quantities to be showed.

We can use histograms when we need to present data where by the categories are in a range, it is used to plot frequency's as well.

13. Histograms are used when you want to show the frequency. Bar charts are more for comparison.

14. What difference do you observe?
both the x and y axis in histograms are represented by numbers and the bars are stuck together. in bar graphs, the bars have equal spacing and the axis can sometimes be represented by groups (words).

When do you use a bar chart and when would you use a histogram?
Bar charts are used to compare the different things like different companies or classes. histograms are use to compare the different "parts" of the same thing like people of a class...

IM TOTALLY CLUELESS. ><''

15. The frequency count is always on the horizontal axis.
Histograms are used to summarize discrete or continuous data that are measured on an interval scale. Bar graphs are used when i need to compare different objects or values at the same time.

16. Bar charts are for showing comparison between number of different things or objects, while histograms are more like for finding the frequency.

17. Histograms do not have spacings between the bars while bar charts have equal spacings between bars.

I would use a bar chart for showing relationship between pieces of data such as the pupil enrollment of schools in different cities. Histograms only show the frequencies of certain objects or people.