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. 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 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.

为说明本研究的实验设置，我们四人研究小组随机被分配至四个停车区域之一，其中两个为露天停车场，另外两个为室内停车楼。针对每个停车区域，我们采集了4组数据集，每组包含20个样本；该20个样本按10个安装应答器（transponder）、10个未安装应答器的比例划分，确保各停车区域的数据集样本分布均衡。数据采集时段为每周两天的13:00至16:00，实验周期为两周。

实验设计
基于分配到的停车区域，我们从停车场内随机选取20辆汽车，记录其品牌与车型，以及是否安装应答器，并拍摄车辆尾部照片以便后续确认车辆生产年份。若安装应答器组或未安装应答器组的样本量未达标，我们将继续随机选取车辆，直至两组均满足各10辆的要求。为避免实验设计中出现伪重复（pseudoreplication），我们围绕以下要点开展实验：在固定时段（13:00至16:00）内开展数据采集、对停车场内车辆进行随机选取、采用均衡化设计，使各组数据集的样本频率保持一致。

数据输入与统计分析
基于车辆的生产年份、品牌及车型，我们通过固定数据源（KBB，2019）查询并确定车辆售价。我们开展了两组双尾t检验：第一组对比停车楼与露天停车场的车辆售价，第二组则针对所有停车区域内安装与未安装应答器的车辆售价进行分析。