Exam Crackers tips Flashcards
MCAT Math
spend no more than 3 mins on any physics questions
Rounding
y=1/x^n
n=logx
Accuracy
how well measurements reflect the true value of something
Precision
how well multiple measured values agree with each other
Random Error
-present in all types of measurements
-shift measurements in unpredictable ways
-decreases precision
Systematic Error
-shift all measurements in a standardized way
-often caused by the way the measurements were taken
Negatively Skewed distribution
-tail extends to the left-left foot
-median-most representative in datasets bc most data sets are skewed
Positive Controls
Researchers manipulate them in a way that’s already known to produce the effect
Negative Controls
groups in which no effects are expected
T test vs ANOVA
-t test: looking for differences between two groups
-Anova: used when two or more groups are present
Chi Square
all categorical
ex: does political affiliation differ by state
T test
-determine whether two groups differ in their distributions of a single variable
-ex: Do men and women differ in IQ?
ANOVA
-Determine whether three or more variables differ in their distributions of a single variable
-Do students learn best in low light, medium light, or bright light?