Cost projection Essay Example | Topics and Well Written Essays - 1000 words

Cost projection - Essay Example The pilot project is eligible for scrutiny and financial consideration as it falls among the green infrastructures programs in the city. In addition, the pilot project is part of the environmental program that the agency showed interest in supporting. The project involves constructing green roofs and blue roofs within NY City as a measure of reducing stormwater runoff. Blue roofs retain stormwater. However, they are not vegetated. The pilot project involves the construction of small-scale weirs at the rooftops that drain inlets and create temporary ponds for gradual release of stormwater. On the other hand, green roofs comprise a vegetative layer in a designed soil that rests on top of the drainage layer. The green roofs are relatively costly than the blue roofs, but they can absorb large amounts of water. The pilot project will scale down the full-scale project into smaller projects that will run for a given duration. The management will then access the benefits and compare the cost of sustaining the water management approach to other approaches under the same conditions of the environment. Installing source controls on the rooftops of the houses in NY City is a vital strategy that the agency needs to consider to reduce the amount of stormwater runoff from entering the sewers. A third of New York City consists of impervious regions. The massive surface of the rooftops in NY City is a characteristic that necessitates the construction of an effective green infrastructure. The pilot project is worth considering due to precision and high level of accuracy in representing the full-scale project. The actual project is big, and the compilation of data involving costs is complex. Additionally, the magnitude of the errors derived from the full-scale projects could be massive. The pilot project is necessary to ensure the reduction in the magnitude of the errors when implementing the actual projects (Mancuso, 2009). In addition, the efficiency of the

HW Essay Example | Topics and Well Written Essays - 250 words - 8

HW - Essay Example C. The descriptive statistic can be obtained using the corresponding option in Excel Data Toolkit (Anderson, Sweeney, Williams, Camm, and Cochrane, 2015). The results are given in the table below. The mean and the median are close to each other, and the skewness is not significant. The stem and leaf diagram shows that the largest number of results is between 2700 and 2800, which is close to the mean value. The data distribution is close to normal with left skewness. D. To develop the table of frequencies the number of classes and class range has to be defined. The number of classes can be defined as a square root of the number of measurements. As N = 41, the number of classes will be 6.4, which is rounded to 7. The class width is found dividing range by the number of classes. Thus, the class range is 2514,643/7 = 359,23 (rounded to 359). The class midpoint is found as the sum of upper and lower boundaries of the class divided by 2. Relative frequency is obtained dividing frequency on the total number of measurements. Cumulative relative frequency is defined as a sum of frequencies for the data smaller than upper boundary of the class (Mendenhall, Beaver, and Beaver, 2013). E. 1. The histogram is built in the coordinates of class midpoint – frequency. The histogram supports the statement that the data distribution is left-skewed. The histogram also confirms that the range between 2700 and 2800 contains the largest number of measurements. 2. Ogive can be built in coordinates cumulaive (or cumulative relative) frequency – upper class bouunbary (Mendenhall, Beaver, and Beaver, 2013). The ogive shows that the small number of data is located in the range between 3500 and 4500. This also supports the statement about left skewness of the data. The highest increase of the frequency is in the range