5-1 Probability Distributions
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What is a variable that has a single numerical value, determined by chance, for each outcome of a procedure?
random variable
What is a description that gives the probability for each value of the random variable and it is often expressed in the format of a table, formula, or graph?
probability distribution
What is a collection of values that is finite or countable?
discrete random variable
What has infinitely many values, and the collection of values is not countbable?
continuous variables
What are the Probability Distribution Requirements?
What is the formula for finding the mean for a porbability distribution?
What is the formula for finding the variance for a probability distribution?
What is the formula for fidning the Standard Deviation for a probability distribution?
The _______ _______ of a discrete random variable x is denoted by E, and it is the mean value of the outcomes.
Expected Value
Using the range rule of thumb, what values are considtered signifcantly low and signifcantly high?
How can you identify significant results using probabilities?
A value is considered significantly high if the probability is 0.05 or less A value is conisered signifcantly low if the probability is 0.05 or less