Math 310 Exam 3
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Response Variable | Measures an outcome or result of a study
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| explanation variable | variable we think explains or causes change in a response variable
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| Correlation coefficient | only values between -1 and 1
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| Postive corrilation | both go up
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| negative corelation | one goes up one goes down
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| lurking variable | a 3rd variable causing corrilation of z variables
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| Strong relationship | r closer to 1 or -1
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| no coorilation | r=0
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| Factorials | positive integer 5! is 5x4x3x2x1
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| Sequence counting principal | actions are performed in a definate order the total outcomes is the product of the actions possibilities
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| Questions to ask | 1. is there repetition
yes- sequencial counting
no- question 2
2. is order important
yes- permutation (NpK)
no- combination (NcK)
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| Uniform sample space | all options have equal odds
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| Addition formula | P(e or F)= p (e) + p(f) - p(e and f)
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| expected value | given by x * p(x)
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