## Tuesday, November 8, 2011

### Kit's Graphing Post

1)Data can be presented using bar graphs, circle graphs, line graphs and pictographs. Different graphs may provide different information and display certain types of data better.

Bar Graphs are best for comparing data across categories.
Advantages: Shows the largest and smallest easier.
Disadvantages: If it's close, you can't really compare.

Double Bar Graphs are best for comparing 2 sets of data across categories.
Advantages: Shows two sets of data.
Disadvantages: You can only do two sets of data.

Circle Graphs are best for comparing categories to the whole using percents. The sum of the percents in a circle graph is 100%.
Disadvantages:It's too much hard work trying to mark the central point.

Line Graphs are best for showing changes in data over time.

Pictographs are best for comparing data that can be easily counted and represented using symbols.
Advantages: Like a bar graph, it can show the biggest and smallest without looking for the numbers.
Disadvantages: Not accurate especially with quarters.

2)Graphs could be misleading by 3 ways. The 3 ways are:
1. Distorting the scale. (Break in the y-axis)
2. Distorting the size of the visuals. (Pictographs only)
3. Distorting the size of the bars. (Make a bar wider)

2a)The 2 graphs that would show how many pizza subs sales accurately are the line graph and the bar graph.
2b)I would keep selling the pizza subs because the trend is going higher each week. It shows a trend.

4)
I would pick the line graph because it shows the trend of sales of healthy good choices going up or down.
4a)