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STA CHAPTER 8
| Question | Answer |
|---|---|
| We _____ a property of a person or thing when we assign a value to represent property | MEASURE |
| We often use an _____ to make a measurement. We may have a choice of the ______ units we use to record the measurements | INSTRUMENT UNITS |
| A variable is a _____ measure or property if its relevant or appropriate as a representation of that property | VALID |
| Often a ____ (a fraction, proportion, or percentage) at which something occurs is a more valid measure than a simple ___ of occurrences | RATE COUNT |
| A measure of a property has ________ if it can be used to predict success on tasks that are related to the property measured | PREDICTIVE VALIDITY |
| Errors in measurement are though like so | measure value = true value + bias + random error |
| A measurement process has _______ if it systematically tends to overstate or understate the true value of the property it measures | BIAS |
| A measuring process has _______ if repeated measurements on the same individual give different results. | RANDOM ERROR |
| If the random error is small, we say the measurement is ______ | RELIABLE |
| Want to reduce bias? | Use a different INSTRUMENT to make measures!! |
| A reliable measuring process will have a small ________ of the measurements | VARIANCE |
| Want to improve reliability? | Repeat measurements multiple times for the AVERAGE result!! |
Created by:
liladdoyle