Term
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Definition
| When the design of the study systematically favors certain outcomes |
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Term
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Definition
| The grouping of individuals based on some characteristics |
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Term
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Definition
| Two active treatments rather than an active treatment and a control |
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Term
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Definition
| The effect of one variable on the response variable cannot be separated from the effect of another variable on the response variable |
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Term
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Definition
| An inactive treatment where no experimental condition is applied |
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Term
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Definition
| A sample of subjects who are readily available |
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Term
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Definition
| A list or graph that shows the possible values of a variable together with the frequency of each value |
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Term
Conditions for a Valid Experiment
(3) |
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Definition
Control or Comparison
Randomization
Replication |
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Term
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Definition
Minimum
Q1
Median
Q3
Maximum |
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Term
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Definition
A measure of variability recommended for skewed data or data with outliers
IQR=Q3-Q1 |
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Term
Left Skewed
Mean vs. Median |
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Definition
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Term
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Definition
An observation<Q1-1.5IQR
An observation >Q3+1.5IQR |
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Term
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Definition
| Selected using a random device where each individual in the population has a chance (doesn't have to be equal) of being selected |
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Term
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Definition
The maximum observation minus the minimum observation
Max-Min |
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Term
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Definition
| Having more than one individual in each treatment group |
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Term
Right Skewed Distribution
Mean vs. Median |
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Definition
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Term
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Definition
| A sample of size n selected in such a way that each possible sample of size n has an equal chance of being selected |
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Term
Standard Normal Curve
Shape
Mean
Standard Deviation |
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Definition
| A normal distribution with mean=0 and standard deviation=1 |
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Term
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Definition
| A measure of the number of standard deviations a value or observation is from the mean |
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