Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

Why is a control group used?

Answer and explanation

Correct answer: To provide a basis for comparison

The direct answer is A: a control group provides a basis for comparison. To understand it, imagine two similar groups. The treatment group receives the factor being tested, while the control group does not receive that treatment or remains under the normal condition. Comparing their results helps us decide whether the treatment caused the observed change. Option A is correct because the control group acts as a reference or baseline. Option B is wrong: a control group is not created to make an experiment longer. Option C is wrong: changing all variables would make the investigation unfair and would prevent us from identifying the cause. Option D is wrong: a control group is not used to hide results; good science records and reports results honestly. For example, when testing fertiliser, untreated plants can be the control group and fertilised plants the treatment group. The groups should otherwise be as similar as possible. Memory cue: control means comparison, not secrecy or total change.

Related tags

Control GroupComparisonExperimentHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.