एक छात्र दावा करता है कि संगीत पौधों की वृद्धि बढ़ाता है। संगीत वाले पौधे खिड़की के पास और बिना संगीत वाले पौधे अँधेरे कोने में रखे गए। मुख्य भ्रमकारी चर कौन-सा है?
A student claims that music increases plant growth. Plants with music were kept near a window while plants without music were kept in a dark corner. What is the main confounding variable?
Explanation opens after your attempt
C. प्रकाश की उपलब्धताAvailability of light
Concept
Different light exposure adds its effect on growth between the groups. Only the independent variable should differ between groups.
Why this answer is correct
The correct answer is C. प्रकाश की उपलब्धता / Availability of light. Different light exposure adds its effect on growth between the groups. Only the independent variable should differ between groups.
Exam Tip
दोनों समूहों में प्रकाश अलग होने से वृद्धि पर उसका प्रभाव भी जुड़ गया। समूहों के बीच केवल स्वतंत्र चर बदलना चाहिए।
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