Term
| Point percentage chane vs. percentage change |
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Definition
- point percentage change = subtract old and new percentage
- percentage change= (X1-X0)/XO
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Term
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Definition
- mathematical ways of summarizing every single data point in the defined structure of a probability distribution
- can compare two or more distributions and make conclusions about specific meaningful relationships among them
- probability of finding individual value of an estimate with degree of certainty
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Term
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Definition
- normal bell shaped curve if continuous random variables
- 1 SD= 68%
- 2 SD= 95%
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Term
| how to convert abnormal distributions to normal distributions |
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Definition
| use natural log (log of the variable), than say it has a logarithmic scale |
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Term
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Definition
- way to convert raw data score to make it comparable
- Process
- take any individual data point
- take mean of group
- subtract mean from individual group
- divide by SD
- formula for z score (use only if you know all characteristics of your population)
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Term
| importance of confidence intervals |
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Definition
| allows us to make statements about where the population value is likely to lie in relation to the estimate |
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Term
| test to use if there are two scale variables |
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Definition
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