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Measurements are precise if the results are very close in value. The choice of measuring apparatus can affect the precision of data collected. For example, during an investigation...
It is important for an experiment to be a fair test. You conduct a fair test by making sure that you change one factor at a time while keeping all other conditions the same. For example, let's imagine that we want to measure which is the fastest toy car to coast down a sloping ramp.
- Key Info
- Measures of Central Tendency: mean, Median, and Mode
- Measures of Dispersion: Range, Variance, and Standard Deviation
So now you have collected your raw data, and you have results from multiple trials of your experiment. How do you go from piles of raw data to summaries that can help you analyze your data and support your conclusions? Fortunately, there are mathematical summaries of your data that can convey a lot of information with just a few numbers. These summ...
In most cases, the first thing that you will want to know about a group of measurements is the "average." But what, exactly, is the "average?" Is it the mathematical average of our measurements? Is it a kind of half-way point in our data set? Is it the outcome that happened most frequently? Actually, any of these three measures could conceivably be...
Measures of central tendency describe the "average" of a data set. Another important quality to measure is the "spread" of a data set. For example, these two data sets both have the same mean (5): Although both data sets have the same mean, it is obvious that the values in data set 2 are much more scatteredthan the values in data set 1 (see the fol...
Learn how to make a test fair when working scientifically with this Bitesize Science guide.
Try out practical experiments in this KS3 science game. Recording appropriate data from an experiment is essential to allow valid conclusions to be drawn. Find out more with BBC Bitesize. For...
Mar 3, 2022 · A Fair Test is based on just one difference or change (the Independent variable). In most experimental inquiries, we want to figure out if the change we make is actually causing the effect we see. In a fair test, it is important to only change one variable at a time.
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Aug 16, 2018 · Solve a scientific method word search puzzle to gain familiarity with the terms. Use this handy glossary to look up the definitions of scientific method vocabulary terms, including variables and parts of an experiment.
