When researchers manipulate a variable in a study, they are carrying out a(n) – . The manipulated variable is often called the – variable. A manipulated variable always has more than one level, or – . Researchers measure the – variable to determine the effect of the manipulated variable on it. Researchers often keep certain other factors constant on purpose. This kind of variable is called a(n) – variable.

answer; i had to look this up and the only one i found was(last only 15 minutes) plz check first and good luck;

all people shall have equal rights upon birth and ever after. (when referring to the rights of man the declaration of the rights of man only applied to landowning men who were 25 years or older and paid taxes equal to 3 days worth of work and were not servants.

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answer; ///any two strangers are likely to share many coincidental similarities;