The results only give an indication about precision; they give no indication of accuracy. Accuracy is a measure of how close the results are to a known literature value; however‚ because a known molarity for the hydrochloric acid is not known‚ a measure of accuracy cannot be made. In contrast‚ a measure of precision can be made using the results. Precision refers to how close a set of results are to each other. In this lab‚ the percent relative average deviation can be used as an indicator of preciseness
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several ailments and surgeries are performed through the instructions communicated from one part of the world to other and with the help of robotic aids several critical surgeries are undertaken with minimal pain to the patient and with great precision and accuracy. Technology can also be used for negative purposes such as warfare leading to mass destruction and this should be avoided as all the developments which have taken shape
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cylinder INTRODUCTION The purpose of this experiment is to study the relationship of several types of volumetric glassware and the accuracy of measuring the volumes of liquids very precisely in quantitative laboratory work. The accuracy of the measurement the volumes is the degree of closeness of measurements of a quantity’s actual volumes while the precision of the volumes is the degree to which repeated measurements under unchanged conditions show the same results. Each of volumetric glassware
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uncertainty gives the reader an idea of the precision and accuracy of your measurements. Use the following method for finding the uncertainty associated with any measuring device used in lab. First‚ find the least count‚ or the smallest printed increment‚ of the measuring device. On the meter sticks‚ the least count is 1 mm. On the double pan balances‚ the least count is 0.1 g. On the small graduated cylinders‚ the least count is 25 ml. If you are using the full precision of the instrument‚ you are probably
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the data from before created a graph. Using the graph‚ get the best-fit straight line to examine the relationship. Using the predicative model (the best-fit line) to determine the percent copper and zinc in pennies. Then accuracy the errors and error percentages. Precision the absolute deviation and the deviation percentages. Observation: Part 1: Pre-82 Pennies Weight 10 dry pre-82 pennies which get 30.29g‚ using 30ml initial volume measuring the volume of 10 pennies‚ record the data 3.0ml
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EXPERIMENT #1: SCIENTIFIC MEASUREMENT AND ERROR By: Date: 8/26/13 Objectives: The goals of the experiment are to learn how to use different types of scientific glassware and to understand the significance of precision and accuracy in scientific measurement. Procedure: No modifications were made during the experiment. Data: Data tables for the experiment are provided on attached sheet. Calculations: Table I - Table III – Table IV –
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WebMD’s website on ADHD I have come to realize that the information is accurate‚ current‚ and provides a complete overview of the topic at hand. The definition of Accuracy is defined as‚ “the condition or quality of being true‚ correct‚ or exact; freedom from error or defect; precision or exactness; correctness.” (dictionary.com) Accuracy is important when dealing with any type of information; but more so when dealing with medical information. WebMD provides us with link where we can contact the author
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0.03 g/cm^3. The results for this experiment prove that as you increase % of NaCL‚ the density increases also because of the weight of NaCL is increased. Graph #1 shows that as the %NaCL increased so did the density‚ therefore proving the accuracy and precision of part II calculations. In part III‚ of the experiment‚ the density of regular shaped objects‚ were calculated based on volume measured method and water displacement method. My hypothesis for this part of the experiment was that volume measured
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01.07 Accuracy and Precision: Balance Lab Worksheet Calculations Show all of your work for each of the following calculations and be careful to follow significant figure rules in each calculation. 1. Part I: Density of Unknown Liquid 1. Calculate the mass of the liquid for each trial. (Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid.) Trial 1 36 - 25.5 = 10.5 Trial 2 36.5 - 25.5 = 11 Trial 3 36.9 - 25.5 = 11.4 2. Calculate the
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three years. This article uses the straight sell tactic. The article consists of a straightforward and clear presentation of the digital watch and its benefits. The advertisement clearly explains the features of the watch such as its precision and accuracy‚ differentiating it from other watches. The article actually states that‚ "if you travel-this watch is a necessity" (People‚ 2003). The advertisement also uses the educational tactic. The ad offers a detailed explanation of the digital
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