Topic+2

Topic 2 alex r Acurracy and precision: accuracy is the degree to wich the result agrees with the theoretical value. precision indicats how well that result can be repeated [] In my own words I think of accuracy as how close to the target you can get. Like in archery how close to the bulls eye you can get. And precision is like shooting a few arrows, if the arrows are all in the same spot or close to it you have good precision. But if one shoot is on one side of the target and the other is one the other side that is bad precision.

Rya S. __**Example one :**__ An example of accuracy and precision is a dart board. On a dart board you always try to hit the middle.. Let’s say there is one spot not necessarily in the middle that keeps being hit. That is precision. The darts would not be near the middle so is not necessarily correct, but it is precise to be hitting the same spot. High precision would be a bunch of darts all over the board, but a majority of them near the middle. That would be accuracy. The darts are going to where they need to be. They might not all be hitting the same spot but they are near the middle. Both precision and accuracy would be the darts all hitting the middle and being in the same area. This shows that the darts are where they need to be and are being thrown there multiple times. That is one example of accuracy and precision. __**Example two:**__

Another example would be when anyone is measuring something. They take the measurements that may not necessarily be right, but they are all generally the same number. That is prevision. Accuracy may be when someone is getting a cluster of numbers that are correct and incorrect, but they are still some correct. Both would be getting the right measurements and have them repeating. that is another example of accuracy and precision.

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Samantha L.

 1. What is the length of the nail measured to the proper number of decimal places? 4.40cm  2. What is the volume of the liquid in the graduated cylinder to the proper number of decimal places?74.98mL  3. What is the rule for determining the number of decimal places that should be recorded when making measurements? two decimal places  4. If the actual volume of the liquid in the graduated cylinder is 73.8 mL, what is the percent error of your measurement? 1.33%