Kuiz Statistik
Uji pemahaman anda tentang konsep sisihan piawai
Why This Quiz Matters
Standard deviation is a measure of spread, variance refers to squared spread, and a z-score is a standardized distance from the mean. A quiz is a low-stakes assessment that shows whether those definitions are genuinely understood or only vaguely recognized.
| Skill | What the quiz checks | Why it matters |
|---|---|---|
| Definition recall | Can you explain the metric in plain English? | Prevents formula mimicry without understanding |
| Formula choice | Can you choose sample versus population mode? | Avoids denominator mistakes |
| Interpretation | Can you explain whether spread is high or low? | Improves reporting quality |
Quiz Questions
Apakah yang diukur oleh sisihan piawai?
Jika semua nilai dalam set data adalah sama, apakah sisihan piawai?
Apakah hubungan antara varians dan sisihan piawai?
Bilakah anda perlu menggunakan sisihan piawai sampel (s) dan bukannya sisihan piawai populasi (σ)?
Dalam taburan normal, kira-kira berapa peratus data berada dalam satu sisihan piawai daripada min?
Mengapa sisihan piawai sampel membahagi dengan (n − 1) dan bukannya n?
Untuk set data {2, 4, 4, 4, 5, 5, 7, 9}, apakah min?
Set data manakah yang mempunyai sisihan piawai yang lebih besar?
Apa yang berlaku kepada sisihan piawai jika anda menambah pemalar yang sama kepada setiap nilai dalam set data?
Apa yang berlaku kepada sisihan piawai jika anda darab setiap nilai dengan 2?
Apakah skor-z?
Manakah antara berikut yang TIDAK dipengaruhi oleh outlier?
Pekali variasi (CV) berguna untuk:
Dalam kawalan kualiti, proses dengan sisihan piawai yang lebih kecil secara amnya dianggap:
Apakah ralat piawai min?
Frequently Asked Questions
What is this statistics quiz for?
The quiz checks whether you can recognize the meaning of standard deviation, variance, and related terms in plain language. A statistics quiz is a short assessment tool that helps you confirm conceptual understanding before you rely on a calculator result.
Should I calculate first or reason conceptually first?
Conceptual reasoning should come first. If you understand what the metric is measuring, you can choose the correct calculator mode and recognize an implausible output before it appears in a report.
Why do quizzes matter for statistical literacy?
They reveal whether a person knows what the result means, not just how to click a tool. Statistical literacy refers to the ability to interpret numbers in context and avoid common reasoning mistakes.