Which of the following explains why randomized controlled trials are often “double blind”? To allow for genuine observations, since no researcher knows which participants are receiving the treatment and which are not. To decrease bias by ensuring both the participants and researchers do not know who is receiving the treatment and who is not. To increase bias by ensuring both the participants and researchers do not know who is receiving the treatment and who is not. To allow for subjectivity, as the participants who believe they are all taking the treatment will report that they are feeling better or worse.
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How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process
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Chemistry, 22.06.2019 22:30
Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.
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Match the vocabulary terms to their definitions. 1 . a long, chain-like set of molecules made up of repeating units joined end to end polymer 2 . a hard, brittle, heat- and corrosion-resistant material made by subjecting a nonmetallic mineral mixture to intense heat ceramic 3 . a plastic with low elongations that cannot be recycled thermoset 4 . a carbon fiber embedded in a polymer resin matrix thermoplastic 5 . a plastic with high elongations that can be recycled crystal 6 . a solid form resulting from the arrangement of atoms, ions, or molecules in definite geometric patterns composite
Answers: 1
Which of the following explains why randomized controlled trials are often “double blind”? To allow...
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