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Description
Flashcards by jennabarnes12387, updated more than 1 year ago
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Created by jennabarnes12387
about 10 years ago
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| Question | Answer |
| what is important to know about the x values for continuous random data? | they can be infinity with no definite end being defined as P( -infinity, infinity) |
| how is continuous random data represented? | a probability density curve which is a smooth curve over the relative frequency. |
| how the events represented? | as the intervals on the x axis |
| what are the events? | the area under the curve, over the intervals |
| the x values for a density curve must always be ___? | greater then or equal to zero |
| what is another name for a bell curve? | a normal curve |
| u is the? sigma is the ? | u is the mean, sigma is the spread of the graph |
| 68% of the graph? | falls within 1 standard deviation of the mean |
| 95% of the data? | falls withing two standard deviations of the mean? |
| 99.7% of the data? | falls within three standard deviations of the mean |
| how do you define the probability of one standard deviation? 2? | - P(u-sigma < or equal to X < or equal to u+sigma) = 0.68 - P(u-2sigma < or equal to X < or equal to u+2sigma) = 0.95 |
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