Data Engineering Master CertifiTopic: Data Cleansing

What is the difference between "Replace Missing Values" and "Impute Missing Values"? $($Select ALL correct answers$)$

$25$:$32$

A$.$ Replace Missing Values requires a nested predictive model to learn on non$-$missing values, whereas Impute Missing Values does not.

B$.$ Impute Missing Values requires a nested predictive model to learn on non$-$missing values, whereas Replace Missing Values does not.

C$.$ Replace Missing Values has a simple setting to insert a fixed value such as zero, whereas Impute Missing Values does not.

D$.$ Impute Missing Values has a simple setting to insert a fixed value such as zero, whereas Replace Missing Values does not

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$30$:$47$

Topic: Data Cleansing

Which of the following pre$-$processing operators could have been used to transform att$1$ in the example below? $($Select ALL correct answers$)$

$\backslash$table$[[$BEFORE TRANSFORMATION$],[$Row No$.,$label,att $1],[1,0\mathrm{.}794,27\mathrm{.}532],[2,0\mathrm{.}294,42\mathrm{.}649],[3,0\mathrm{.}335,10\mathrm{.}127],[4,0\mathrm{.}048,7\mathrm{.}885],[5,0\mathrm{.}037,45\mathrm{.}786],[6,0\mathrm{.}446,-2\mathrm{.}301],[7,0\mathrm{.}803,32\mathrm{.}095],[8,0\mathrm{.}684,21\mathrm{.}639]]$

AFTER TRANSFORMATION

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$\backslash$table$[[$Row No$.,$label,att$1],[1,0\mathrm{.}794,0\mathrm{.}310],[2,0\mathrm{.}294,1\mathrm{.}113],[3,0\mathrm{.}335,-0\mathrm{.}615],[4,0\mathrm{.}048,-0\mathrm{.}734],[5,0\mathrm{.}037,1\mathrm{.}280],[6,0\mathrm{.}446,-1\mathrm{.}276],[7,0\mathrm{.}803,0\mathrm{.}552],[8,0\mathrm{.}6000$