Measurement

Before we talk about measurement scales and why they matter we should first explain what they are. A compound measure allows us to measure different aspects of a topic people would find complex. This topic could range from stem cell research to abortion to gun control. The good thing about compound measures is they have a general reliability to them. What I mean is, if an error is made it often does not make the whole measurement go wrong. Compound measures should have several different…

using the scientific process one of the most essential components is comparing theory to actual measurements. This relies on the accuracy and uncertainty of the measurement itself. If an actual measurement proves the theory wrong it you must know the uncertainty so you can try to figure out where the error took place. Uncertainty can arise from a few different areas; they are statistical variation, measurement precision, or systematic error. Systematic error is in most cases human error like…

Measurements of Stress in Life Science Stress can be defined as the physiological, psychological and behavioural responses towards change. It is a common problem of humans’ and it is increasing progressively. Conditions of stress are work load, work place, conflicts between co-workers, social life issues, environment and time pressure. It has two types: eustress or positive stress which means performance improvement and distress or negative stress which can lead to mental and physical…

(“Wikipedia”). Typically, if one were to place a weight towards the free end of a cantilever, some bending, or flexion, would be expected. Flexion, in this case, is the action of bending or the condition of being bent (“Merriam-Webster”). Given that angle measurements are involved, a protractor is typically used to measure flexion at the bending point of the cantilever. As stated before, the fact that flexion will occur as the cantilever length changes is already known. I want to see how much…

This week’s assignment asked the class to discuss the benefits of measuring health behaviors. Without the current health behavior measurement, they are several statics that warn against unhealthy behavior that wouldn’t have the data needed to provide critical data, needed to educate the population on harmful consequences. Let take smoking for instance, without the surveillance of smoker, organization like the CDC wouldn’t have the ability provide statics that show the health burden caused by…

Boots, he writes about the use of hand and laser measurement devices used at crime scenes. One hand held measurement method that Books writes about is a rolling measurement device. This type of device should be checked against a steel tape measure to compare over various distances. Boots states, "Probably one of the most commonly used devices is a good old-fashioned…

Introduction Elena Muhs was contacted by the company Tantrum Toys to test a new bubble solution they had created to see if it would make bigger, longer lasting bubbles compared to other formulas. Her group was instructed to test six bubble solutions, one of which was Tantrum Toys new solution and another was Tantrum Toys currently marketed solution. Each solution was identically packaged and marked with only a solution number in order to eliminate the possibility of bias in the laboratory. Muhs…

picking the closest centimeter measurement visibly possible for the diameter and circumference by wrapping the paper tape measure around the circles. The worst method would be using a ruler or meter stick. The only improvements that could be made is the use of smaller units to minimize uncertainty. Report Question: Wood The uncertainty of the volume of the wood was 2.40*10-4%. The uncertainty of the mass of the wood was 3.11*10-6%. The uncertainty of the density measurement is .77 ±…

Office Spaces is updating their office chairs and have decided to alter the material and cross section of the arm supports. They have requested our assistance in evaluating several materials through experiments and simulations. The purpose of this experiment is to test these various materials and to recommend a material choice and cross section geometry that will minimize deflection of the arm supports. The following sections of this memorandum will detail several facets of the experiment.…

Original Hypothesis: Prior to performing any measurements or calculations in the lab, it was originally hypothesized that the 10 mL volumetric pipette would be the most precise and most accurate instrument, while the 10mL graduated cylinder would be the least precise and least accurate instrument. Sample Calculation: For the 10 mL volumetric pipette, three weight of water measurements were taken by first weighing a beaker on the scale, measuring 10 mL of water with a volumetric pipette,…