.
5. Describe when each type of graph (line, bar, scatterplot, and pie)
should be used.
6. Apply graphic design principles to create spreadsheets and graphs.
Before launching a business venture with your capital, or someone
else’s, it is a good idea to analyze the overall attractiveness of the...
about the relationship between the price and the year the house built? I hope that the older the house is, the cheaper the house will be. However, that is just my hope.
Looking at the graph of the scatterplot of the price and the year built, I find that there is no strong correlation between the...
quartiles. The differencebetween
the quartiles is the interquartile range. The line across the middle of the box identifies the median
sample value.
The lines extending from each end of the box are sometimes called whiskers. The whiskers extend from
the ends of the box to the outermost data points...
same = no association. Joint dist = (and) cell total/grant total. Mar dist = cell row/grant total
HISTOGRAM (SHAPE CENTRE SPREAD OUTLIERS) ONE QUANT VAR: STEM&LEAF – ONE QUANT VAR (SMALL DATA SET): SCATTERPLOT (FORM DIRECTION SCATTER – 2 QUANT VAR: BAR GRAPH – CAT DATA: CONTINGENCY TABLES – 2 CAT VAR...
cumbersome, whereas in a linegraph, the information is represented fluidly, as it is reality. (See Figure 1 for another example.)
What is the differencebetween a scatterplot and a linegraph? Provide an example of each. Does one seem better than the other? In what ways is it better?
A scatter plot...
Tools we will use …
• Scatterplot, a two-dimensional graph of
data values
• Correlation, a statistic that measures the
strength and direction of a linear relationship
between two quantitative variables.
• Regression equation, an equation that
describes the average relationship
between a...
to use the Spearman? What assumptions have to be met to use Pearson?
What is a scatterplot? Be able to interpret one &/or construct one
Be able to identify positive & negative linear relationships from a scatterplot
Know the differencebetween linear & non-linear (curvilinear) relationships
Know...
are staggering, and well beyond what I can discuss here. Suffice
it to say: displaying data in a scatterplot can make truly important information visually apparent.
Scatterplots, Part II: Correlation and trend lines
One reason we graph data in a scatterplot is because we are looking for patter...
to watch for.
The strength of relationship is determined by how close the points in the
scatterplot lie to a simple form such a line.
78
11.2
Correlation coeﬃcient
The scatterplot provides a visual impression of the nature of relation between the x and y values in a bivariate data set...
– remember, it is the independent variable that goes on the horizontal axis (i.e. the x-axis). Make sure you label your axes properly and that your graph has an appropriate title.
Briefly describe the nature of the relationship between these two variables.
3. Considering only production...
-> Scatterplot. You will be given a choice of various dotplot types (choose ‘simple’). Selecting final as the Y variable and exam1 as the X variable, the following scatterplot was created: Notice that there seems to be a linear trend between the two variables. It may be reasonable to consider ﬁtting a line...
.
Histogram: select the relevant data, and choose
Data > Data Analysis > Histogram.
Scatterplot: select the x- and y-coordinates, choose
Input > Scatter, and select the graph at the top left.
2-33
9
...
customer owes.
• What information can we obtain from this
data?
5
Scatterplot: Amount vs Days
All Customers
Scatterplot: Amount vs Days
Medium Customers
Scatterplot: Amount vs Days
Small Customers
Scatterplot: Amount vs Days
Large Customers
6
Analysis -- continued
• There...
type of graph is used to show the relationship between two quantitative variables? 2. When describing a scatterplot, what four things should you always mention?
3. What is meant by an explanatory variable? 4. What is meant by a response variable? 5. What does correlation measure? 6. Explain the...
) vs. horsepower for American (red), European (blue) and Japanese (green) cars.
Figure 1: Scatterplot of car data set [Hoffmann99]
Another important visualization technique for two-dimensional data is the linegraph. The difference to scatterplots is that this time the relation between the...
scatterplots provide information only on simple correlation.
* Remarks, suggestions, hints, solutions: Understanding the differencebetween simple and partial correlation helps with understanding the fact that correlation does not imply causation, which should be emphasized.
3. (Graphical regression...
slope in not 0, nor is
correlation
scatterplot with line
transformation to
standardize spins and
die
set up graph with
standardized lists
exactly the same as
above, after rescaling
with ZoomStat
linear regression
same correlation as
above, and in the “zspace” slope = r...
-taking behaviors. Which method is being used to gather data? What are the advantages to this method? What are the disadvantages?
The method being used is survey. The advantage is that there might be a lot of participants. The disadvantage is that it can be unreliable.
What is the differencebetween...
mild outliers.
* etc???
(g) (i) “describe what you would expect this scatterplot to look like”
I would expect a scatterplot with points
* tightly clustered around /0.5
* an upward-sloping /0.5
* straight line. /0.5...
5 3 1 1 2
Display the data as a scatterplot on the graph paper provided on page 29. Make sure that you have labelled the axes. Draw a line of fit on your scatterplot on the graph paper provided on page 29. (No calculations are necessary.) Using your scatterplot, describe the correlation between...