Monday, November 14, 2011

Ghelo's Graphing Post

Bar Graph
Advantage - are best for comparing data across categories
Disadvantage - the scale might be inaccurate/uneven and hard to read what the exact amount of the bar is
Double Bar Graph
Advantage - are best for comparing two sets of data across categories
Disadvantage - hard to interpret if it is not precisely on the intervalgories in one graph
Circle Graph
Advantage - are best for comparing categories to the whole using percent
Disadvantage - a lot of work is needed and you will have to calculateng percent to find exact amount/ no total amount unless you calculate all numbers
Line Graph
Advantage - are best for showing changes in
data over time
Disadvantage - the scale might be inaccurate and it is hard to tell where the dots are plotted at the first glance
Advantage - best for comparing data that can be easily counted and represented using symbols
Disadvantage - the pictures MUST be a consistent size

2.How can graphs be misleading. Show 3 ways.

Distorting the scale

Distorting the visual

Distorting the size of the bar

2.a) The following chart shows Pizza Sub Sales
over a month. What 2 graphs would show the information accurately? A bar graph and a line graph.

2.b) Yes, I would continue to sell pizza subs because the sales are going up and are improving each week.

4. If I had to convince Mrs. Mota she should sell more healthy choices I would choose the line graph because it will be easier for her to see how good the sales are doing and she doesn't have to calculate to find the exact amount.

Here is a link about line graphs.


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