We would like to know if Intel’s stock and Southwest Airlines’ stock have similar rates of return. To find out, we take a random sample of 50 days, and record Intel’s and Southwest’s stock on those same days.

Question

BlackTom AI · Accepted Answer

To analyze the question, first restate the setup: researchers are sampling 50 days and recording Intel’s stock and Southwest Airlines’ stock on those same days. This design pairs observations of two stocks taken at the same time points.
Option 1: 'Paired' — This choice aligns with the data collection method described. Because each day provides two related measurements (Intel and Southwest on the same day), the observations are naturally paired, and the comparison between the two stocks should account for this pairing.
Option 2: 'Not Paird' — This option suggests that the two sets of observations are independent or unpaired, which would be inappropriate here since the data for Intel and Southwest are collected on the same days, creating a natural linkage between the two measurements for each day. Treating them as unpaired would ignore the within-day connection and could distort analyses that rely on the paired structure.
Additional nuance: when the goal is to compare rates of return between two assets over the same time horizon, pairing by day allows for methods that exploit the day-to-day relationship, such as calculating difference in returns per day or conducting a paired t-test, which increases statistical efficiency by controlling for day-specific market effects. Conversely, treating the data as unpaired would fail to leverage this information and could lead to less precise inferences.
In summary, the described sampling design inherently creates paired observations because both stocks are measured on the same days, making the 'Paired' option the appropriate characterization, while the 'Not Paird' option mischaracterizes the data structure by implying independence between the two series.

FA25_QTM_100_3 7.18: Paired or not? Part II.

We would like to know if Intel’s stock and Southwest Airlines’ stock have similar rates of return. To find out, we take a random sample of 50 days, and record Intel’s and Southwest’s stock on those same days.

查看解析

登录即可查看完整答案

类似问题

We randomly sample 50 items from Target stores and note the price for each. Then we visit Walmart and collect the price for each of those same 50 items.

Consider two sets of data that are paired with each other. Each observation in one data set has a natural correspondence with exactly one observation from the other data set.

Two data sets of different sizes cannot be analyzed as paired data.

Matched pairs is based upon dependent samples.

__________________ refers to the products, methods, inventions, and standards used for the purpose of producing information.

____________________ is data presented in a meaningful context.

_________________ framework—a model of the components of an information system: computer hardware, software, data, procedures, and people.

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单