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.
*Easy to read
*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
continue? How does your graph explain your answer.
A.)I would probably use a line graph because it would show how more and more people are buying Pizza Subs over four weeks. and I would also use a Bar graph.
B.) I would probably continue because well my graph is showing that sales just keeps going up.
A.)Below you see 2 different examples of graphs showing healthy choices sold at the
canteen. If you had to convince Mrs Mota that we should continue selling
healthy choices which graph would you choose?
B.) Change each graph so that your information looks even MORE impressive. You may not change the data
just the graphs.
A.) I would choose the line graph because the line makes it look like more and more people are eating a healthy diet.

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