Shared Flashcard Set
Cards
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| A theoretical model- A ______ distribution happens to describe this "bell-shaped" pattern very well. |
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| The mean, median, and mode of normal distributions are always ______. |
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| A normal distribution is ____-shaped, unimodal and symmetric. |
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| mean and standard deviation |
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| The _____ and ________ __________ completely determine the normal distribution. |
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| The _____ controls the center. |
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| The standard deviation controls the ______. |
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| The normal curve is ALWAYS above __. |
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| The total area under a normal curve and above the horizontal line is ____ or ____% (the probability of all possible values). |
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| Area beneath the normal curve= ____________ (percentage). |
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| The x-axis of a normal distribution are the ____ ______. |
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| standard normal distribution |
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| The _________ __________ ____________ is a normal distribution that has a mean of 0 and a standard deviation of 1. |
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| A standard normal variable is denoted by ___. |
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Definition
For standard normal distributions:
Z~N(_,_) |
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Z=(X-u)/(o)
Standardization. |
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Definition
| Random variable "X" with normal distribution N(u,o^2)can be transformed to Z with the standard normal distribution by the formula: ? And this is known as what? |
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| P-Z_a is available in the table. |
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