Relationship between Car price and Car investments

To explain how the study was set, in our group of four, we were randomly assigned to one of four parking areas, two of which were parking lots and the other two parking garages. As individuals, we compiled 4 datasets of 20 samples for each parking lot. The 20 samples have a split of 10 with and without transponders, ensuring a balanced datasets between parking areas. Data was collected at 1-4pm on two days a week for two weeks.<br>Experimental designGiven the assigned parking area, we randomly selected 20 cars from the parking lot. We recorded the make and model of the car and whether or not they had a transponder, then took a picture of the back to later record the year. If the either set with or without transponder was not completed, we randomly selected more cars until the requirements of 10 cars with and without transponders were fulfilled. In order to reduce the chances of pseudoreplication in our design we framed the experiment by these key points. We measured in an implemented time range (1-4pm), randomized selection of vehicles in parking lots and implemented a balanced design in the form of same number of frequencies across datasets<br>Data Input and Statistical AnalysisUsing the year, make and model we determined the price of the car through a constant source (KBB, 2019). Two 2-tailed t-tests were done that measured for the prices of garage parking vs lots, and the other test for with and without transponders in all parking areas. <br>

为阐明本研究的实验设置，我们四人小组被随机分配至四个停车区域中的一个，其中两个为露天停车场，另外两个为室内停车场。作为个体成员，我们为每个停车区域构建了4组数据集，每组包含20条样本；该20条样本按10台带应答器（transponder）、10台不带应答器的比例划分，以确保各停车区域的数据集保持均衡。数据采集时间为每周两天的13:00至16:00，持续两周。
实验设计：根据分配到的停车区域，我们从停车场内随机选取20辆汽车。我们记录了车辆的品牌与型号，以及是否安装了应答器，随后拍摄车辆尾部照片以便后续记录车辆生产年份。若带应答器或不带应答器的样本组未完成采集，则继续随机选取车辆，直至两组各满足10台的要求。为降低实验设计中出现伪重复的概率，我们围绕以下核心要点开展实验：在固定时段（13:00至16:00）内采集数据、对停车场内车辆进行随机选取、并通过保证各数据集的采样频次一致来实现均衡化实验设计。
数据录入与统计分析：基于车辆生产年份、品牌及型号，我们通过固定数据源（KBB，2019）查询对应车辆的售价。本研究开展了两次双尾t检验：第一次检验室内停车场与露天停车场的车辆售价差异，第二次检验所有停车区域内安装与未安装应答器的车辆售价差异。