Case Study on Descriptive Statistical Example | Topics and Well Written Essays - 500 words

On Descriptive Statistical - Case Study Example n various states of the US economy, it is important to find out how far the given observations are scattered around the mean observation for which the standard deviation is used as a reliable measure. For the same reason, this paper has also taken the support of a histogram. The purpose of a histogram is to find out the frequency density, i.e., how the observations are clustered within the different classes. The data for the number of students enrolled in US public elementary schools is obtained from the 2004 report published by the US National Center for Education. This data has been used to find out the spread of elementary education among various states in the US economy. But, before progressing it is important to define some useful statistics that will help to draw empirical conclusions. The degree of scatteredness is measured be the standard deviation; but before defining it, it is necessary to calculate the mean of the observations, because, the scatteredness of observations actually suggests how far they are dispersed about their mean value. Now, mean is defined as, Besides, the coefficient of variation for the concerned data is also being calculated since it will help in finding out the percentage of variations present in the data being collected. Coefficient of variation is defined as, The standard deviation statistic so obtained implies that the observations are rather too highly scattered about their mean value (670.2). This fact is prominent from the value of the coefficient of variation which indicates that the observations are scattered by a degree of 120% around their mean value. The histogram derived from the data show that most of the observations are scattered towards the leftmost position in the graph, thus yielding a positively skewed curve. From the curve, however, one obvious point is that very few states have a high number of students enrolled in public elementary schools. The purpose of this paper was to find out the spread of

Paraphrase Essay Example | Topics and Well Written Essays - 1000 words - 1

Paraphrase - Essay Example According to Gorbett and Pharr, flash point is defined as the â€Å"minimum temperature of a liquid at which sufficient vapor is given off to form an ignitable mixture with the air, near the surface of the liquid or within the visual used, as determined by the appropriate test procedure and apparatus† (2011, p.g., 310). In addition to this definition, NFPA classifications state that lamp oil, which is used for this experiment, is combustible and flash point will occur at temperature higher than 100 degrees F. To reach this point, the temperature of the flame needs to increase at a minimum of 5 degrees every minute. With these objectives in mind, the experiment was completed to determine the exact temperature when flash point would occur with lamp oil. Within this experiment, there were particular factors that were essential variables to completing this process. These pieces include the actual experiment ingredients as well as personal protective equipment or PPE. The necessary components of this experiment include the following: With the purpose and components of the closed cup flash point experiment established, this analysis can now provide the steps followed to garner the determined results in this process. The experiment was completed in the listed steps: This closed cup flash point experiment with lamp oil was completed by testing temperatures of flame beginning at 82 degrees F and ending at 167 degrees, which was the temperature when the oil finally did reach flash point. Before analyzing the results of the experiment, it is important to highlight that, as with nearly any scientific experiment, there was a potential for human error. In the context of this experiment, the human error could have occurred in the step which required the flame to increase by 5 degrees F each minute the lamp oil was being tested to determine flash point. Aside from this potential degree of human error, the