Which of the following is not a problem associated with observational studies?
A. The main conclusion may be invalid because of the confounding effects of uncontrolled variables
B. Estimates may be biased because of non-random sampling
C. Observations have to be taken on groups of individuals rather than on individuals themselves
D. None of the above
Answer: Option D
Solution(By Examveda Team)
None of the aboveThis Question Belongs to General Knowledge >> Teaching And Research
Most important work of teacher is
A. To organize teaching work
B. To deliver lecture in class
C. To take care of children
D. To evaluate the students
Environmental education should be taught in schools because
A. It will affect environmental pollution
B. It is important part of life
C. It will provide job to teachers
D. We cannot escape from environment
At primary level, it is better to teach in mother language because
A. It develops self-confidence in children
B. It makes learning easy
C. It is helpful in intellectual development
D. It helps children in learning in natural atmosphere
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