## Thursday, November 10, 2011

### Kyia's Graphing Post

Bar Graph

Advantage - Is the bar graph you can clearly compare the different categories and tell which one is the most popular.
Disadvantage - Is that you cant tell what the exact the number.

Double Bar Graph

Advantage - Can compare two different types of data sets.
Disadvantage - Is that you meant get confused with the two different sets of data.

Pictograph

Advantage - You can clearly tell what the exact number is.
Disadvantage - Is that you can only use the pictograph when the numbers are even.

Circle Graph

Advantage - You can compare the data to the whole percent easily.
Disadvantage - You have to do a lot of work to get the percent of the categories .

Line Graph

Advantage - Is that you can see your trend over time really easily.
Disadvantage - Is that you can only use the line graph for over time data.

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

Distorting the bar

When you distort the bar you make one look 3-D , colour one of the bars a different colour than the rest,Make on of the bar wider. You do this to make one of the bars stand out so it seems more importation.

Distorting the Visuals

When you distort the visuals, you would want to take the one with the less number and make the picture bigger so seems that if has the same numbers or even more.

Distorting the Scale

When you distort the scale you make a break in the y axis, when you have a break you want it to be big so its more different.

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

Bar Graph and Line Graph

Bar graph because its best for comparing categories

Line Graph because its best for comparing data over time.

3a) If you were selling Pizza Subs would you continue? How does your graph explain your answer.

Yes, because each week the items went up so more people got pizza subs so most likely week 5 would have went up and kept going up for i would still continue selling.

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?.

I would use the pictograph because there seems to be a big different from September and November

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