Please help me with the following questions: 1. What of the following are correct statements about missing values in data? Choose all that apply. a.Missing values must be imputed using best guesses. b.Certain analytics algorithms can tolerate (i.e., work with) data with missing values c.Records with missing values must be dropped. d.The pattern of missing values needs to be analyzed to determine how to handle missing values.   2.In the following code, df is a pandas DataFrame: print(df.isna().sum()) Which statements about the above code are correct? Choose all that apply. a.It tabulates records (i.e., rows) of missing values in the data frame df. b.It prints out the total number of missing values in the data frame df. c.It tabulates number of missing values in each column of the data frame df. d.For it to work properly, missing values must be represented using standard representation supported by pandas package.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Please help me with the following questions:

1. What of the following are correct statements about missing values in data? Choose all that apply.

a.Missing values must be imputed using best guesses.

b.Certain analytics algorithms can tolerate (i.e., work with) data with missing values

c.Records with missing values must be dropped.

d.The pattern of missing values needs to be analyzed to determine how to handle missing values.

 

2.In the following code, df is a pandas DataFrame:

print(df.isna().sum())

Which statements about the above code are correct? Choose all that apply.

a.It tabulates records (i.e., rows) of missing values in the data frame df.

b.It prints out the total number of missing values in the data frame df.

c.It tabulates number of missing values in each column of the data frame df.

d.For it to work properly, missing values must be represented using standard representation supported by pandas package.

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