Thursday, November 10, 2011

Marlo's Graph Post

There are five kinds of graphs and they are :

1.)Bar graphs - Bar graphs are best for comparing data across categories.
*Represents data easily
*Easy to make
*Gives you results easier.
* Graph categories can be reordered to emphasize certain effects
* Use only with discrete data
* Limited space for labeling with vertical bar graphs
2.)Double graphs - Double Bar Graphs are good for comparing two sets of data across categories.

*Great for comparing two sets of data.
*Represents data easily
*Not all intervals might work.

3.)Circle graphs- Circle graphs are best for comparing categories to the whole using percents.
*Compares categories in parts of a whole using percents.

*Its hard to get the percents of the categories.

4.)Line graphs- Line are best for showing changes over time.
*Shows changes overtime.
*Its harder to know the intervals.
5.) Pictographs - Pictographs are best for comparing data that can be easily counted and represented using symbols.
*They all have to be the same size.
There are three ways a graph can be misleading.
1.) Changing the size of the bars - Making it look 3D, Making one look much bigger than the other.
2.)Changing the scale - Making a break in the Y-axis.
3.)Making one picture look bigger.
a.)The following chart shows Pizza Sub Sales over a month. What 2 graphs would
show the information accurately?
b.)If you were selling Pizza Subs would you