Level of measurement

Experiment 2: Aim: In this experiment you will determine the mass of a single drop of water by a graphical method. You will evaluate its uncertainty. Data: Table 1: Number of Drops: Mass of Beaker + drops/g (0.01g) 1 2.36 g 2 2.38 g 3 2.40 g 4 2.44 g 5 2.46 g 6 2.48 g 7 2.50 g Chart 1: Analysis: The mass of 1 drop of water is 0.4g. By taking the total mass and dividing it by the number of drops we can figure out the average mass of a drop of water. However the number of drops should…

and learning how to calculate error in an experiment when using lab equipment that involves measurement, since measurement is not always precise. A-2. Tell the reader the subject of the experiment and what the key experimental variables are. • The subject of the experiment is to practice and learn how to use some of the laboratory equipment (i.e. pipette, graduated cylinder, etc) and understand why measurement is not always precise and how to calculate errors. • The independent variables are…

Discussion: Water was transferred from burettes and pipettes to a beaker, in order to see how accurate and precise these instruments would be. The displacement of the burette would be the measured volume of the water. Similarly, the water from the 5.00mL or 10.00mL pipette was transferred to a beaker. The beaker w/ water mass and the initial mass of the beaker was subtracted to obtain the grams of water in the beaker. Using the temperature of the water, the density could be found, allowing…

important activities of science is measurement. Measurement is a means of quantifying properties for identification. For example, density is the relationship between the mass and volume of a pure substance. One could determine if a piece of yellow metal is gold by determining its density. Measurement allows scientists to make comparisons. Measurement also provides a means by which scientists can judge the reproducibility of an experimental procedure. However, measurement is not an activity that…

A constant question to go through a student’s mind is do grades really matter? The often happens when times get tough and grades are the main reason why students get stressed. Most parents think that grades are the key towards an accomplished future overall. Do grades really determine our future? Should we stress them more? Is this a proficient system? First off everyone knows that good grades are key to a successful future. In high school, the SAT is a big test that can determine whether you…

The article, When Nothing Is Sure, All Things Are Possible was written by Dr. Deborah D. Canter. The main purpose of this article was for readers to understand “dietetic genealogy”. Dietetic genealogy is the study of dietetics background tracing all history related to the profession. Overall, Dr. Canter’s article was very informative. The profound information regarding historical dietetic information was the most interesting factor. Dr. Canter touched bases on each decade of the 20th century and…

important for professionals who use psychological testing. With that being said, the method attributes the consistency of the test measurements and excludes chance and nonessential factors in the outcome (p. 89). On the other hand, Hays defines that validity compromises the relevant and applicable inferences that are made by the instrument. In fact, these sales of measurements are like a variety of tools…

in behavioral measurement? Validity measurement is important, because it measures the target behavior, measures the duration of the target behavior and any questions that are directed towards that behavior. Validity also makes sure the data was tracked at appropriate times and are relevant to the target behavior(Cooper, Heron & Heward, 2007, p. 103). If none of these elements add up, then the resulted data is compromised, therefore the data is meaningless. Reliability measurements are based…

Does it Screen? Alexander Hamm Period 2 Ms. Ulrich 11/29 (Graphic that represents the lab) Abstract: My experiment is about testing which brand of sunscreen works best, Equate, Banana Boat, or Coppertone. These sunscreens are available at different prices at most any market. The procedures of the experiment were not very complicated, and should be easy to reproduce. First, you put 20 UV sensitive beads into a plastic bag, and put a thick layer of 50 SPF sunscreen on the…

length and width of a wrench jaws, and the length and width of the cutting edge of the chisels. As mentioned previously, class characters were also recorded for the tool marks themselves. These class characteristics include, but are not limited to, measurements of the length, width and depth (if applicable) of the…