What is a biased graph Misleading someone without
What is a biased graph? Misleading someone without changing the actual data but organizing the graph so that someone is given the wrong idea for the conclusion
What causes a biased graph? n The intervals on the y-axis n n Small invervals will make a large difference Large intervals will make a small difference
How do you identify bias in a graph? 1. 2. 3. Look at the graph and explain the answer to the problem – using the line(s) or bars Investigate the dot or the top of the bar to see what the actual number (DV) is If what you thought the answer was is different than what the numbers tell you it is, the graph is biased
How do I avoid making a biased graph? n n After you choose the correct graph (bar, line, or pie) and after you set up each axis (IV-x and DV-y) and after you decide on the range of numbers for the x and y axes ---- equally space out tick marks and decide on the interval (large intervals make small difference and small intervals make large difference) Trial and error
What is experimental error? n When the scientist makes a mistake in the experiment n Set up (comes from research) n n n Wrong hypothesis (biased/incomplete research) Too many IV in your procedure (didn’t keep controlled variables the same throughout the experiment) Measuring n n n Wrote # wrong Wrote the wrong unit Mathematical calculations are wrong
How do you know if you have experimental error? n n Most of the time – data from experiment doesn’t match your hypothesis If someone repeats your experiment and doesn’t get the same data
What do you do if you have experimental error? n n n Find out what caused the mistake Do more research (maybe hypothesis is wrong) Repeat experiment, if necessary (check measurements and calculations first if you can)
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