statistika

statistika

University

10 Qs

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statistika

statistika

Assessment

Quiz

Computers

University

Practice Problem

Easy

Created by

Winda Kurnia Sari

Used 2+ times

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10 questions

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1.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Mengapa asumsi normalitas penting dalam regresi linier?

Agar regresi linier bisa dilakukan pada data kategorik

Supaya nilai koefisien regresi menjadi besar

Agar uji statistik seperti t-test dan F-test valid

Untuk mempercepat proses regresi

2.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Ciri-ciri data tidak normal secara visual adalah...

Histogram berbentuk lonceng

Histogram miring ke kiri atau ke kanan

Scatter plot acak

Q-Q plot membentuk garis lurus

3.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Transformasi logaritma paling tepat digunakan ketika data memiliki...

Skewness positif

Skewness negatif

Nilai data yang sudah normal

Korelasi rendah antar variabel

4.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Rumus dari transformasi akar kuadrat adalah...

log(x)

√x

1/x

5.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Apa kekurangan dari transformasi kebalikan (reciprocal)?

Menghilangkan outlier

Hanya untuk data dengan nilai negatif

Sulit diinterpretasikan dan tidak bisa untuk x = 0

Menurunkan korelasi

6.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Transformasi Box-Cox digunakan untuk...

Menghilangkan variabel

Membuat data menjadi log

Menyusun model regresi

Mencari parameter λ terbaik untuk membuat data lebih normal

7.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Setelah melakukan transformasi data, langkah selanjutnya adalah...

Menghapus data lama

Menguji ulang normalitas dan membandingkan hasil regresi

Melakukan clustering

Menggunakan model klasifikasi

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