Flashcards in Probability and Statistics Deck (27)
What is one easy way to solve permutations?
Fundamental Counting Principle
What is an ordering of n objects?
What does n! mean?
n times all the whole numbers less than it.
What is n! called?
How is the number of permutations of r object taken from a group of n distinct objects denoted?
What is the formula for nPr?
n! / (n-r)!
What is a selection of object from a group, where order is NOT important?
What does n stand for (nPr or nCr)?
Total number of objects.
What does r stand for (nPr or nCr)?
Number to be chosen.
What is the formula for nCr?
n! / r! (n-r)!
What is the mean?
What does σ stand for?
What does x̅ stand for?
Besides mean, what are other measures of tendency?
Median and mode
What do variance and standard deviation show?
How much data values deviate from the mean of the data set.
When looking at data variation, if there are small values the data will be
When looking at data variation, if there are larger values, the data will be
What is σx^2?
What is a function that gives the probability of each outcome in a list of possibilities?
What has data that vary randomly from the mean?
What is the graph of a normal distribution called?
In a normal distribution: what percent of data fall within one standard deviation of the mean?
In a normal distribution: what percent of data fall within two standard deviations of the mean?
In a normal distribution: what percent of data fall within three standard deviations of the mean?
A normal distribution has a symmetric ____ shape centered on the ____.
Sometimes an extraordinary factor affect data that would otherwise be normal, making it a ______ ____________.