Figure 1. This figure shows Chlorophyll A and Secchi depth for each of the four sites. There is also a trend line to show the overall shape of the data.
First look at the graph, read the x and y axes labels. Did they even graph the data correctly? Answer the following questions:
- What is wrong with the Y axis?
- What do the diamonds represent?
- What do the squares represent?
- They decided to use a trend line.
- Consider the data…was a trend line appropriate for the squares? Why or Why not?
-
- Consider the data…was a trend line appropriate for the diamonds? Why or Why not?
- What would have been a better way of presenting the data?
- Once you have figured out what the student was trying to show THEN try writing a figure caption that tells a better story.
Homework Answers
(first part) there is origin problem in the y-axis as there are two zero(0) on the y-axis
diamonds is secchi depth
squares is chlorophyl A
(second part)a. no there is no trend for the squares as the points are scattered
b. yes there is trend for the diamond as the points are looking on a curve (may be straight lile)
c. line-graph may be better way to present the data , size on y-axiz and secchi depth and chlorophyl A should be on x-axis
Add Answer to:
Figure
1. This figure shows Chlorophyll A and Secchi depth for
each of the four sites....
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The following data
represent a company's yearly sales volume and its advertising
expenditure over a period of 8 years.
Develop a scatter diagram of
sales versus advertising and explain what it shows regarding the
relationship between sales and advertising. Make sure your axes are
labeled and that you have the axes correct (notice that x and y are
above the labels). The graph should have a title that mentions the
two variables.
Use the method of least
squares to compute...
1. Describe the trend of the data, if any.
2. Calculate the linear correlation coefficient and is the
linear correlation coefficient
significant? Why/why not?
3. Find the least-squares line of regression.
4. Graph the regression line on the scatter plot
5. Plot the residuals (give it your own title and labels for the
axes!) with lines for 2 standard
deviations of the residuals.
6. Predict the gas mileage of a 2000, 3000 and 4000 lb car.
Make a scatter plot...
Above is a table of my data, I don't really understand what
question seven (also pictured above) is asking for or how to make a
graph from that data that comes out even remotely linear. Any help
is greatly appreciated, and please include all the steps if
possible! Thank you so much for your time.
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