Examlex
The nucleus of each human cell contains ________, which are threadlike structures made up of deoxyribonucleic acid (DNA) .
Random Assignment
Assigning participants to experimental and control groups by chance, thus minimizing preexisting differences between the different groups.
Test Difficulty
The measure of how challenging an examination or a set of questions is, often determined by the proportion of test-takers who answer correctly.
Experimental Group
The group in an experiment that receives the variable being tested, contrasted with a control group that does not.
Randomly Assigned
A method used in experiments where participants are allocated to different groups in an unpredictable manner to reduce biases and ensure validity.
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