Posted on Categories:Nonparametric Statistics, 统计代写, 统计代考, 非参数统计

# 统计代写|非参数统计代写Nonparametric Statistics代考|STATS205 Design of Control Charts

avatest™

avatest非参数统计Nonparametric Statistics代写，免费提交作业要求， 满意后付款，成绩80\%以下全额退款，安全省心无顾虑。专业硕 博写手团队，所有订单可靠准时，保证 100% 原创。avatest™， 最高质量的非参数统计Nonparametric Statistics作业代写，服务覆盖北美、欧洲、澳洲等 国家。 在代写价格方面，考虑到同学们的经济条件，在保障代写质量的前提下，我们为客户提供最合理的价格。 由于统计Statistics作业种类很多，同时其中的大部分作业在字数上都没有具体要求，因此非参数统计Nonparametric Statistics作业代写的价格不固定。通常在经济学专家查看完作业要求之后会给出报价。作业难度和截止日期对价格也有很大的影响。

avatest™ 为您的留学生涯保驾护航 在网课代考方面已经树立了自己的口碑, 保证靠谱, 高质且原创的网课代修服务。我们的专家在非参数统计Nonparametric Statistics代写方面经验极为丰富，各种非参数统计Nonparametric Statistics相关的作业也就用不着 说。

## 统计代写|非参数统计代写Nonparametric Statistics代考|Sample Size, Sampling Frequency, and Variable Sample Sizes

The sample size and the sampling frequency (the length of time between two consecutive samples) must be specified before a chart can be implemented. These depend on considerations such as time and cost, and the size of the shift to be detected. Both can impact the statistical performance of the chart. Larger samples can detect smaller shifts but are more expensive and time consuming, whereas smaller samples can be sufficient if the expected shift is large

Frequency of sampling, that is, how often to collect data, is impacted by conditions on the ground, so to speak, that is, again, time and cost and expected shift. Obviously, it is desirable to take large samples as frequently as possible, but this is probably not going to be feasible. We can generally take smaller samples at shorter time intervals (more frequency) or larger samples at longer time intervals (less frequently). Current industry practice favors the former approach. Automated data collection facilities have made this process much easier, so much so that it is not uncommon to sample and inspect every item that is produced.

The appropriate sample size can be determined by looking at the underlying process variability and the size of the shift. Generally, a process with a relatively large inherent variation requires reasonably larger samples to detect an OOC condition as opposed to a process with a relatively small inherent variation. In general, it is also easier to detect a small shift using larger samples as opposed to when the process shift is relatively large, for which smaller samples would be sufficient.

## 统计代写|非参数统计代写Nonparametric Statistics代考|Variable Control Limits

Although the former approach to variable sample sizes makes the calculations and interpretation of the control charts easier, with the availability of current computer technology it is natural to try to calculate the exact control limits based on the actual size $n_{i}$ of each sample. Here, the control limits are calculated separately for each subgroup based on the subgroup size $n_{i}$. This implies that the spread between the $U C L$ and the $L C L$ will vary (increase or decrease) as the sample size varies. However, the varying width is merely an indication of the varying amount of information available from each sample, as portrayed by the different sample sizes. Consequently, the visual representation of these control limits is not as attractive as those based on the average sample size with constant control limits. On the one hand, having fixed rather than varying control limits is definitely more pleasing to the eye. On the other hand, the interpretation of these variable control limits is still the same. If a point plots on or above the $U C L$ or on or below the $L C L$, it is regarded as a signal of a possible OOC process, whereas a point that plots between the two control limits is regarded as no signal and is associated with an $\mathrm{IC}$ process.

## MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中，其中问题和解决方案以熟悉的数学符号表示。典型用途包括：数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发，包括图形用户界面构建MATLAB 是一个交互式系统，其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题，尤其是那些具有矩阵和向量公式的问题，而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问，这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展，得到了许多用户的投入。在大学环境中，它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域，MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要，工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数（M 文件）的综合集合，可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。