LAB #4 In-Class Quiz (Lecture #04) on Septeber 4 2025

[Lighton Phiri]

[2024/25 CSC 4792] LAB #4: In-Class Quiz (Lecture #04)

Hello Everyone, Please that we have LAB #4 scheduled to be administered as an in-class quiz on September 4 2025 at 18H00 in Micheal Kelly Lecture Theatre located at the School of Education. LAB #4 shall be based on Lecture Series #04 ---Data Preprocessing and Transformation (AGAIN!). Please remember that "Labs" account for 10% of the course score. Best wishes, Lighton [2024/25 CSC 4792] LAB #4: In-Class Quiz (Lecture #04) Thursday Sep 4, 2025 ⋅ 18:00 – 18:15 (South Africa Standard Time) Location SLH View map Guests

University of Zambia

Great East Road Campus, Lusaka

www.unza.zm

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[Davy Mwansa]

GOOD MORNING SIR, some bit of confusion here,  The formula shows different from the computation 

Formula
 

Computation

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CSC 4792: Data Mining and Warehousing
Department of Computing and Informatics
University of Zambia
P.O. Box 32379, Lusaka 10101, Zambia
Email: csc...@unza.zm
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[Lighton Phiri]

Hello Everyone,

This is a reminder that Lab #4 is scheduled to be administered today (September 4 2025) at 18H00.

The venue is Michael Kelly Lecture Theater, located at the School of Education.

Best wishes,
Lighton

-- 
Lighton Phiri, PhD
Lecturer and Researcher

Telephone: +26 096 1352662
Email: lighto...@unza.zm
DataLab: https://datalab.unza.zm
EMI Project: https://emi.org.zm
UNZA: https://www.unza.zm

University of Zambia
Great East Road Campus 

Lusaka, Zambia 10101
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[Bwalya Chanda]

Good morning Sir. We're still waiting for the release of the LAB #3 solutions. Regards, kindly.

--

CSC 4792: Data Mining and Warehousing
Department of Computing and Informatics
University of Zambia
P.O. Box 32379, Lusaka 10101, Zambia
Email: csc...@unza.zm
Web: https://groups.google.com/a/unza.zm/g/csc4792
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[Bwalya Chanda]

Sorry Sir, I just saw the solutions. My apologies.

[Lighton Phiri]

Hello Bwalya,

Lab #3 model solutions were shared six days ago: see email attachment.

Best wishes,
Lighton

-- 
Lighton Phiri, PhD
Lecturer and Researcher

Telephone: +26 096 1352662
Email: lighto...@unza.zm
DataLab: https://datalab.unza.zm
EMI Project: https://emi.org.zm
UNZA: https://www.unza.zm

University of Zambia
Great East Road Campus 
Lusaka, Zambia 10101
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[Lighton Phiri]

Hello Everyone,

Please note that Lab #4 solutions have been made available on The Moodle [1] under the "Labs/Quizzes" section.

[1] https://moodle.unza.zm/mod/resource/view.php?id=95628

Best wishes,
Lighton

-- 
Lighton Phiri, PhD
Lecturer and Researcher

Telephone: +26 096 1352662
Email: lighto...@unza.zm
DataLab: https://datalab.unza.zm
EMI Project: https://emi.org.zm
UNZA: https://www.unza.zm

University of Zambia
Great East Road Campus 
Lusaka, Zambia 10101
--

[Davy Mwansa]

Good morning sir, concerning the quiz solutions I would like to understand where the values for "gym" "the" and "vanga" are coming from, cause if I check the documents provided, I can't see any of those words, therefore they should be all zeroes 

Another thing is that, counting correctly the number of unique words(vocabulary ) are more than 25 in the 3 documents you provided.

 please clarify on that one as well 

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[Lighton Phiri]

Hello Davy (and Everyone),

File previously uploaded had incorrect values for dataframe: the correct answer is "KeyError" actually.

See current version of solutions.

Best wishes,
Lighton

-- 
Lighton Phiri, PhD
Lecturer and Researcher

Telephone: +26 096 1352662
Email: lighto...@unza.zm
DataLab: https://datalab.unza.zm
EMI Project: https://emi.org.zm
UNZA: https://www.unza.zm

University of Zambia
Great East Road Campus 
Lusaka, Zambia 10101
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[Davy Mwansa]

Good afternoon sir, so are you going to consider a table with zeroes on all the features? 🥲

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[Mwanda Chipongo]

That is wrong. Those words are not in the vocabulary.

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