Wednesday, September 30, 2009
The Bonzo Burger 44% vs The Big Cheese 56%
a) Which burger seems to be the favorite? Explain.
The Big Cheese because it's bigger.
b) How is this graph misleading?
They made the Big Cheese look bigger so it would fool people thinking its increased by a lot.
c) How should this graph be redrawn to represent the data more accurately?
Put it into a bar graph.
The grade 8 students voted where to hold their year-end party. The results of the vote were presented in this graph.
a) Based on the graph below, how many times more popular was the beach than the pool.
Answer= The beach appears to be three and half times bigger as the pool!
b) Leah concluded that the majority of the students want to go to the beach. Is she correct? Explain.
Answer=No, the majority did not choose the beach. Only 50 out of 115 votes cast were for the beach!
Is this better and I cant make the picture bigger!
a) Explain how this graph is misleading.
The y-axis has a break between 0 and 200.
b)From the graph using a vertical scale from o to 600. What conclusion can now make about the profits from January to June.
The Profits seem to be 4 times as high in June as they were in January.
c)Draw a new graph using a vertical scale from 0 to 600. What conclusion can you now make about the profits from January to June.
profits are 2 1/2 times higher in June as they were in January.
Thanks for looking at my scribe please comment
The two circle graphs are meant to represent the same information. Does it appear that way ? explain.
A) No, the two circle graphs are have the same information but graph A isnt showing the correct information.
B) Identify the errors in graph A .
B) graph A shows that D=35% when its really showing 50% and its also showing that C=25% when really its less than that.
The health sector is at the front of the diagram and appears much larger than the energy and education sectors
C) Draw a new graph to represent the data more accurately
NOTICE: Sorry i don't no how to put the picture here . So its up there ^ it's the first picture. Again sorry if it is blurry i will re-type it: at the bottom it says , others , transport,energy, housing, education, and health and the title was Provincial budget 2008-2009
Thank you and please comment on my mistakes( If I have any)
a) Explain how this graph could be misleading.
This graph could be misleading because it has a broken Y axis and the bars don't have the same width.
b) What conclusion does the graph suggest about Scott's progress compared with Bryce's progress?
The graph says that Scott's quest progress appears to to be twice as much as Bryce's.
c) Describe how to redraw the graph to represent the data more accurately.
Fix the break (start with 0) and make the bars widths equal.
Two grade 8 classes collected cans for the food drive. Ms. Chan's class brought in 100 cans. Mr. Rajwani's class brought in 200 cans. Luke made this graph to display the results. Questions...
A) How is this graph misleading?
B) Based on the graph, what can you conclude about the canned drive?
C) Draw a different graph that is not misleading.
A) This graph is misleading because the picture only shows 6 cans in each box which doesn't really show any information.
B) At the end of this graph its pretty much saying that Mr. Kajwani's class brought in 100 more cans for the can drive.
a) Explain how this graph could be misleading.
It's misleading because it the y-axis goes up by 100. Maybe it should go up by 50.
b) Based on the graph. What can you conclude about the outcome of voting?
Candidate B is winning the election.
c) Does the data support the claim made
in the title? If not, reword it to correct
No votes were divided equally, they should make the title Voting Results.
6.From the pictograph, which fruit seems to sell the best? Explain
A)First look, the apples seem to have sold more because it pops out more.
Does it seem that more cherries were sold or more peaches? Explain
B) It seems more peaches were sold because they are whole and larger pictures
How should the pictograph be redrawn to represent the date more accurately?
C)The pictograph should be drawn with all the pictures the same size.
Tuesday, September 29, 2009
5.) The election results for student council president were displayed in a bar graph. -->
a.) How many times taller does the bar for B appear than the bar for A ?
B appears to be 3 times the size of A.
b.) How many times as great are the votes for B than the votes for A ?
The votes for B are twice as much of the votes for A.
c.) What conclusion does the graph suggest about the election results?
The conclusion is that they distorted the graph so much that something only two times it's size, is now 3 times it's size.
d.) How could the graph be redrawn to make the data clearer?
Since they are all friendly numbers, you shouldn't of used the break and you should have an interval of 25.
4. Samantha recorded the temperture on a hot day. She displyed the data in a graph.
A) Explain how this graph could be misleading.
This graph is misleading because the Y-axis contains a break.
B) What conclusion does the graph suggest about the changes in tempearature?
The graph suggests that the temperature increased significantly between 8 a.m. and 2 p.m.
C) How should the graph be redrawn to make the data clearer?
The graph should be redrawn with a consistent scale on the y-axis from 0 C to 32 C without a break.
Monday, September 28, 2009
QUESTION # 2
a ) Sophie surveyed her friends about their favorite flavor of ice cream. What information is missing on the graph?
The information missing on the graph is the total of people there are, and also the number of ice creams.
b) How could you present this data more accurately ?
The number of people interviewed isn't displayed anywhere in this graph. For the graph to be accurate you need to know how many people were interviewed.
( Sorry if the lettering might turn out big or anything.)
Key Words :
1) . distorting the scale.
2). distorting the information by using visuals of different sizes .
3). making the numbers look bigger , makes it looks like its more important .
Sunday, September 27, 2009
The table shows the decibel levels of different sounds in the environment.
a) Use a bar graph to display the data. What is one advantage of using a bar graph ?
One advantage of using a bar graph is that the bar graph shows details more clearly than others by the bars but it depends on the numbering.
b) Could you use a line graph to display the data ? Explain.
Yes you can use a line graph to display the data, because the line graph is the same way to show data but it is not as accurate as the bar graph.
c) Could you use a circle graph to display the data ? Explain.
No you can not use a circle graph to display the data, because the displayed data does not add up to 100%.
d) Would a pictograph be an affective way to display the data?
Explain why or why not ?
A pictograph could be used to display the data, but it would not be as accurate as a bar graph because of the fractions of pictures required to represent the displayed data.
Saturday, September 26, 2009
a). Explain how this graph could be misleading.
This graph could be misleading because the sizes of the pictures are not all the same sizes.
b). What conclusion does the graph suggest about favourite lunch specials?
This shows that the Hamburgers are the most popular lunch specials.
You can redraw the graph but this time draw the pictures the same sizes.
Friday, September 25, 2009
Ravi recorded his spending for one month.
He displayed the data in a circle graph and
a) How much more does Ravi spend on food than on movies? Which graph shows this more clearly? Explain.
Ravi spent ten dollars more on food than movies. The pictograph shows this information more clearly, because the pictograph shows the exact number of money he spent, unlike the circle graph that shows percent.
b) Ravi spends half of his money on food and clothing. Which graph shows this more clearly? Explain.
The circle graph shows this more clearly, because money and food covers half of the graph.
c) Describe one advantage, and one disadvantage of using each graph.
An advantage for using the pictograph, would be if you are dealing with it's designated number (10), or 5. And an advantage for using the circle graph, would be if you're trying to figure out what percent of Ravi's money does she use on a certain thing.
Thursday, September 24, 2009
The table shows the heights of two friends measured over time.
(a) Use a double bar graph and a double line graph to display the data.
Double Bar graph :
Double Line graph:
(b) How are the trends for Andrea and Lewis similar? How are they different ?
Andrea and Lewis's trends are similar until age 2-10 where, Andrea was taller than Lewis. But it then changes by age 12-16 because, Lewis is taller than Andrea.
(c) Which graph do you think more clearly shows each student's height trend? Explain your choice.
The line graph shows the students height trends, because line graphs are better for things that change over time.
(d) Would two circle graphs be effective for displaying the data? Explain why or why not .
Two circle graphs wont be as effetive because there was no total given.
- Ann practiced 16 hours.
Monday, September 7, 2009
Blogging is a very public activity. Anything that gets posted on the internet stays there. Forever. Deleting a post simply removes it from the blog it was posted to. Copies of the post may exist scattered all over the internet. I have come across posts from my students on blogs as far away as Sweden! That is why we are being so careful to respect your privacy and using first names only. We do not use pictures of ourselves. If you really want a graphic image associated with your posting use an avatar -- a picture of something that represents you but IS NOT of you.
Here are a few videos that illustrate some of what I want you to think about:
Two teachers in the U.S.A. worked with their classes to come up with a list of guidelines for student bloggers.
One of them, Bud Hunt, has these suggestions, among others:
- Students using blogs are expected to treat blogspaces as classroom spaces. Speech that is inappropriate for class is not appropriate for our blog. While we encourage you to engage in debate and conversation with other bloggers, we also expect that you will conduct yourself in a manner reflective of a representative of this school.
- Never EVER EVER give out or record personal information on our blog. Our blog exists as a public space on the Internet. Don’t share anything that you don’t want the world to know. For your safety, be careful what you say, too. Don’t give out your phone number or home address. This is particularly important to remember if you have a personal online journal or blog elsewhere.
- Again, your blog is a public space. And if you put it on the Internet, odds are really good that it will stay on the Internet. Always. That means ten years from now when you are looking for a job, it might be possible for an employer to discover some really hateful and immature things you said when you were younger and more prone to foolish things. Be sure that anything you write you are proud of. It can come back to haunt you if you don’t.
- Never link to something you haven’t read. While it isn’t your job to police the Internet, when you link to something, you should make sure it is something that you really want to be associated with. If a link contains material that might be creepy or make some people uncomfortable, you should probably try a different source.
Another teacher, Steve Lazar, developed a set of guidelines in consultation with his students. You can read them here.
Look over the guidelines and add the ones you like in the comments section below this post; either from one of Steve's students or one of your own. I think Bud's suggestions are excellent. We'll be using the one's I highlighted above as a basis for how we will use our blog.
I could not have written it any better. Enjoy blogging and use your head. Thanks