Interpreting Graphics Flashcards
(19 cards)
SEE method with a twist
SELECT dropdown icon for answer choices
Then eyeball and estimate (especially if there’s a big spread in choices)
How do I approach a new chart or graph?
Read descriptions, dive into what form of graph, number distributions(how much each increment actually goes up by), stay vigilant of trick words, minimize math
Safe bet for a guess could be?
One out of a pair of answer choices that equal 100% since one of them is a trap
Eyeball what on graphs…
any noticeable changes, what’s the trend
Stacked column chart pro’s and con’s…
gives you summation of the two data points BUT hard to estimate top bar
Clustered column chart pro’s and con’s…
Emphasizes differences BUT now requires you to add both data points to determine sum
Line chart trap…
Do NOT assume continuous data collection between each period. Could be snapshot with no telling what happens in between
Scatter plots show…
relationship between 2 columns of data. Either positive or negative or NO correlation
A pie chart pro’s and con’s…
Every piece equals 100% but a single Pie chart can only show one series of data
Weird BS that the GMAT creates like bubble charts and third axises should be handled by…
NOT freaking out
Slow down, see if you can focus on one data point and explain what is being articulated.
Follow intuition, use blurb for guidance, remember use answer choices to manipulate numbers and figure out which parts actually need to be solved
Venn diagrams will test your understanding of…
if the calculation is the on the overlap, one specific section or multiple
average arithmetic mean is?
Sum of all terms / number of terms
Weighted averaged is?
Σ (ValueX * amount of valueX in relation to total)
Median is?
How to do deal with even number of terms?
- Middle number or 50th percentile. 2. Take arithmetic average of the two terms in the middle
Mode is?
The observation that shows up the most in the dataset
When determine spread you have two methods, explain them
- Range is the crude calculation. Greatest number minus the smallest, vulnerable to outliers
- Standard deviation: On average how spread is each point from the mean.
What happens to standard deviation if you…
1. Duplicate all members in the set
2. Multiply/divide entire set by X
3. Remove outliers
- Nothing changes
- Then the deviation with grow/shrink by X many times
- It will shrink
A regression explains…
Relationship between two datasets using X and Y axis, like a scatter plot
The formula of a line is
y = m(x) + B
