Dr. story found that the children in two-parent homes had higher reading-test scores than those in one-parent homes. however, the children from two-parent homes had more siblings than those in one-parent homes. what is the confounding variable?

number of siblings        

Explanation:

Confounding variables, in statistics are variables that affect both the independent variable and dependent variable, causing a bogus association. It can not be characterized in terms of associations and correlations, as it a casual concept. Confounding variables can devastate an experiment and create pointless results.

The approach to reduce confounding variables is Restriction, Randomization, Matching, etc.

a.indigo and cochineal

b.animal hides

c.silver and gold

e.cacao beans and sugarcane

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.

explanation: hope this