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Probability Distributions
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Mind Map
by
shirley.ha
, created
about 6 years ago
HBS108 (Descriptive Stats) Mind Map on Probability Distributions, created by shirley.ha on 09/10/2013.
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descriptive stats
hbs108
Created by
shirley.ha
about 6 years ago
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Topic 8.2: Descriptive Stats
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Probability Distributions
1 standard deviation has a close relationship with the normal distribution or bell-shaped curve
2 Aka sample distributions & distibution patterns
2.1 distribution of all possible values that can be taken by that statistic.
3 formed by calculating that statistic for each of a large number of samples of the same size that are drawn randomly from the population
4 Normal distribution curve aka standard normal distribution
4.1 continuous and can display any value from a dataset; it is a smooth, bell-shaped curve that is symmetric about the mean of the distribution.
4.1.1 symbol for the sample mean is .
4.2 defined by a formula in which there are only two sample variables
4.2.1 mean and standard deviation (SD).
5 NORMAL DIS = PROB DIS so the area under the curve is equal to 1
5.1 calculating probabilities using curve
Media attachments
distributions.png (image/png)