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Class 9 Science के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ScienceIn an experiment students were allowed to choose their treatment group. What problem may result?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpertScienceWhat is the main purpose of randomly assigning plants to groups when comparing two fertilizers?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationExpertScienceIn an experiment samples are assigned to groups according to the student's preference. What is the main risk?Class 9Exploration: Entering the World of Secondary ScienceHypothesis and experimentationHardScienceParticipants were randomly assigned to groups but the outcome assessor knew the assignments. Which bias is still possible?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceExpertScienceA study sample represents the population well but group assignment was not random. Which conclusion is correct?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceExpertScienceThe treatment and control groups differed at the start of an experiment. Which improvement would most strengthen causal testing?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceExpertScienceIf participants were randomly assigned to groups but the sample came from only one school which quality is stronger and which is limited?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceExpertScienceWhy do random sampling and random assignment serve different purposes in an experiment?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceExpertScienceAn experiment was designed to test causation but participants chose their own groups. What is the main risk?Class 9Exploration: Entering the World of Secondary ScienceNature and meaning of scienceExpert

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