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BANL 1100 Review [English]

Flashcard
•
Business
•
University
•
Hard
Derek Nicoll
FREE Resource
Student preview

49 questions
Show all answers
1.
FLASHCARD QUESTION
Front
What is the first step in analyzing a dataset like the Baidu search logs?
Back
Clean and prepare the data
Answer explanation
分析像百度搜索日志这样的数据集的第一步是清理和准备数据。这确保数据准确且可用于进一步分析,例如创建可视化或运行统计测试。
2.
FLASHCARD QUESTION
Front
Which of the following is NOT typically part of the data cleaning process? Handling missing values, Converting data types, Creating a data dictionary, Performing regression analysis
Back
Performing regression analysis
Answer explanation
进行回归分析是一种用于预测的统计方法,而不是数据清理步骤。数据清理通常涉及处理缺失值、转换数据类型和创建数据字典。
3.
FLASHCARD QUESTION
Front
How do I create a histogram in R to visualize the distribution of response times across different device types?
Back
Use the hist() function with facet_wrap()
Answer explanation
要可视化不同设备类型的响应时间,请使用 hist() 函数为每个设备创建直方图。将其与 facet_wrap() 结合使用,可以为每种设备类型创建单独的图,从而有效地显示它们的分布。
4.
FLASHCARD QUESTION
Front
What statistical test should I use to compare click-through rates between mobile and desktop users?
Back
Z-test
Answer explanation
Z 检验适合用于比较两个独立组(移动用户和桌面用户)之间的点击率,当样本量大且数据呈正态分布时
5.
FLASHCARD QUESTION
Front
How can I use ggplot2 to create a scatter plot showing the relationship between query complexity and time spent on search result pages?
Back
Use geom_point()
Answer explanation
要可视化查询复杂性与在搜索结果页面上花费时间之间的关系,请在 ggplot2 中使用 geom_point()。该函数创建散点图,有效地显示这两个变量之间的关联。
6.
FLASHCARD QUESTION
Front
Which R packages are best for cleaning and preprocessing the Baidu search log data?
Back
dplyr and tidyr
Answer explanation
dplyr 和 tidyr 非常适合清理和预处理数据,因为它们具有强大的数据操作和重塑功能。ggplot2 和 lattice 用于可视化,而 caret、glmnet、rpart 和 randomForest 则专注于建模。
7.
FLASHCARD QUESTION
Front
What's the most appropriate way to visualize trends in search volume over time using R?
Back
Line plot
Answer explanation
A使用 R 可视化搜索量随时间变化的趋势,最合适的方法是线图,因为它有效地显示了连续时间变量的变化和模式,便于解释趋势。
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