## Monday, November 14, 2011

### Danicka's Graphing Post

Bar graph Advantage: best for comparing data across categories
depending on the scale/intervals it may be difficult to identify the exact number of data

best for comparing two sets of data across categories
depending on the scale /interval it may be difficult to identify

Pictograph-Easy to read ,visually appealing, handles large data sets easily using keyed icons
Hard to quantify partial icons, icons must be of consistent size,best for only 2-6 categories
Circle graphs-displays data as a percentage of the whole but no exact numerical data,
hard to compare 2 data sets,hard time constructing .

line graph are best for showing the changes of data over time (shows trend too).

it can only be use for data that is over time

How can graphs be misleading. Show 3 ways.

1.Distorting the scale(putting a break on y-axis)
2.Distorting the visuals(make the symbol larger than the rest)
3.distorting the size of the bars(make 1 bar wider or put area)

3a) The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately.

line graph and bar graph.

3b) If you were selling Pizza Subs would you continue? How does your graph explain your answer. Yes,i will continue selling pizza subs because at my graph it shows that pizza subs that are sold increase every week

4.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.bar graph and line graph

4a) Change each graph so that your information looks even MORE impressive. You may not change the data just the graph.