# Shared Flashcard Set

## Details

Physics Ch. 12 - Data-Based and Statistical Reasoning
MCAT
9
Physics
03/27/2016

Term
 What are skewed distributions? Which way will the tail point in negatively and positively skewed distributions?
Definition
 Skewed distributions are those that contain tails and aren't symmetrical distributions. A negative skew would have a tail that points to the left a positive skew would have a tail that points to the right.
Term
 What is a bimodal distribution?
Definition
 A bimodal distribution is one that has two peaks with a valley in between.
Term
 How to calculate interquartile range and determining outliers from that
Definition
 Multiply n by 1/4 or 3/4 for 1st or 3rd quartiles respectively. If the number is a whole number, the quartile is the mean of the value at this position and the next highest position. If it is a decimal round up to the next whole number and take that as the quartile position. If a value falls more than 1.5 interquartile ranges outside the first or third quartiles it is considered an outlier.
Term
 What are the three typical causes of outliers?
Definition
 1. A true statistical anomaly (ie 7ft tall person)2. A measurement error3. A distribution not approximated by the normal distribution such as a skewed distribution with a long tail.
Term
 independent vs. dependent events
Definition
 independent events have no effect on one another while dependent events impact one another such that the order changes the probability.
Term
 mutually exclusive outcomes
Definition
 can't occur at the same time
Term
 exhaustive
Definition
 when a group of outcomes includes all of the possible outcomes
Term
 How would you determine the probability of that only one of two independent events will occur?
Definition
 Add their independent probabilities together and subtract the product of their probabilities.
Term
 What do linear, parabolic, exponential and logarithmic graphs look like?
Definition
 linear - a lineparabolic - a Uexponential - logarithmic -
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