1057 お客様のコメント
質問 1：
What is the main purpose of using the bootstrapping technique in inferential statistics?
A. To estimate the sampling distribution by resampling with replacement
B. To filter outliers from a dataset
C. To validate the syntax of SQL queries in Python
D. To increase the number of features in a model
正解：A
質問 2：
Which function is used to reshape a NumPy array without modifying the original data values?
A. reshape()
B. flatten()
C. transpose()
D. resize()
正解：A
質問 3：
What does the standard deviation of a dataset represent in the context of statistical analysis?
A. The average squared distance from the mean
B. The most frequently occurring value
C. The sum of all values in the dataset
D. The number of outliers in the dataset
正解：A
質問 4：
Which of the following improves the readability of a spreadsheet used for collaborative data analysis?
A. Adding freeze panes to lock header rows
B. Converting numeric values into images
C. Using colored fonts to highlight every cell
D. Removing gridlines from all sheets
正解：A
質問 5：
What is the main purpose of using the bootstrapping technique in inferential statistics?
A. To estimate the sampling distribution by resampling with replacement
B. To filter outliers from a dataset
C. To validate the syntax of SQL queries in Python
D. To increase the number of features in a model
正解：A
質問 6：
What is a key advantage of using the Parquet file format over CSV in large-scale data pipelines?
A. Parquet supports schema evolution and columnar storage
B. Parquet offers row-based compression
C. Parquet stores data in plain text, making it human-readable
D. Parquet files can only be used with Excel
正解：A
質問 7：
When working with relational databases in Python, what are key components required to establish and manage database connections?
(Choose all that apply)
A. Connection object to interface with the database
B. Python's random module for generating keys
C. Database driver or module (e.g., sqlite3)
D. Cursor object for executing queries
正解：A,C
質問 8：
What may occur if a model is evaluated using the same data it was trained on?
A. Data leakage
B. Overfitting
C. Overgeneralization
D. Underfitting
正解：B
What is the main purpose of using the bootstrapping technique in inferential statistics?
A. To estimate the sampling distribution by resampling with replacement
B. To filter outliers from a dataset
C. To validate the syntax of SQL queries in Python
D. To increase the number of features in a model
正解：A
質問 2：
Which function is used to reshape a NumPy array without modifying the original data values?
A. reshape()
B. flatten()
C. transpose()
D. resize()
正解：A
質問 3：
What does the standard deviation of a dataset represent in the context of statistical analysis?
A. The average squared distance from the mean
B. The most frequently occurring value
C. The sum of all values in the dataset
D. The number of outliers in the dataset
正解：A
質問 4：
Which of the following improves the readability of a spreadsheet used for collaborative data analysis?
A. Adding freeze panes to lock header rows
B. Converting numeric values into images
C. Using colored fonts to highlight every cell
D. Removing gridlines from all sheets
正解：A
質問 5：
What is the main purpose of using the bootstrapping technique in inferential statistics?
A. To estimate the sampling distribution by resampling with replacement
B. To filter outliers from a dataset
C. To validate the syntax of SQL queries in Python
D. To increase the number of features in a model
正解：A
質問 6：
What is a key advantage of using the Parquet file format over CSV in large-scale data pipelines?
A. Parquet supports schema evolution and columnar storage
B. Parquet offers row-based compression
C. Parquet stores data in plain text, making it human-readable
D. Parquet files can only be used with Excel
正解：A
質問 7：
When working with relational databases in Python, what are key components required to establish and manage database connections?
(Choose all that apply)
A. Connection object to interface with the database
B. Python's random module for generating keys
C. Database driver or module (e.g., sqlite3)
D. Cursor object for executing queries
正解：A,C
質問 8：
What may occur if a model is evaluated using the same data it was trained on?
A. Data leakage
B. Overfitting
C. Overgeneralization
D. Underfitting
正解：B
Uesugi -
持ち歩きは面倒というのであれば、全ページが電子化されているので、PDFファイルでダウンロードすることもできるところが大好きです。解釈でわかりやく内容を明示。つまづきやすいポイントをフォローしてくれてる。Pass4Testさんの押さえるべきポイントを確実に覚えればなかなかPCAD-31-02試験でいい点は取れると思う。