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Definition
| Variables that could influence the outcome of the experiment but are out of the control of humans. (e.g environment, social interaction) |
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Definition
| A hypothesis that assumes there is no correlation between the two variables. |
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| Control Group/Controlled variable |
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Definition
| Kept the same; does not receive the independent variable. (Used for comparison) |
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Definition
| This is the group that is being tested on, they receive an independent variable. |
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Definition
| Variable that is changed/controlled by the experimentor. (Located on the x-axis) |
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Definition
| Variable affected by changed. (Located on the Y-axis) |
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Definition
| A group that receives a treatment with a known result. This is likely to confirm a particular result. |
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Definition
| A group in an experiment that is used to ensure there is no result. Used as comparison/baseline. |
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Definition
| Also known as the average. This calculated by finding the sum of all the values in a data set. Then dividing by the number of values in a data set. (In Google Sheets: (=Average) |
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Definition
Median: The middle number in a data set.
Mode: The most reoccuring number in a data set. |
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Term
| Standard Error of the Mean (SEM) |
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Definition
Measures how close the sample mean is to population mean. It also determines statistical exactness by placing error bars on your data. Once calculated for it will be in a (-+) format. The bigger the sample size the smaller the SEM.
****Important Note: Overlap in error bars indicates that the data is not statistically significant. If it doesn't overlap data is statistically significant.*****
Once, the SD is calculated for, divide it by the square root of the amount of values in the data set. |
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Definition
The measure of dispersion in a data set from their mean. A bigger sample size a more specific measure of SD.
(=STDEV) on Google Sheets. |
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Definition
| How close a measurment is to the true accepted value. |
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Definition
| How close measurements of the same item are to each other. |
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Definition
| Increases rapidly then caps and slowly levels then falls. |
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Definition
| Patterns observed over time. |
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Definition
| # on the x-axis; change over time or when both variables are continuous. |
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Definition
| Used to compare groups. A good hint is if the X-axis has words instead of numbers. |
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Definition
| Show distrubution, each bar represents a range of values instead of just one. Good to see the general picture, but fails to generate raw data |
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Term
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Definition
The mathematical equation that details the change in percent of an initial (original) number to the final.
|Final-Initial/Initial|x100 = ____%
Has a percent symbol! |
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Term
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Definition
How much a quantity has changed over time (usually) or in relation to something else.
Change in quantity/Change in time = _____
Ratios/Rates. |
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Term
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Definition
| Extra: Find the Max value and divide by 20 to get correct increments. If a decimal round up. |
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