A Researcher Asks a Group of Unhappy People to Follow

question 77

Multiple Choice

A researcher asks a group of unhappy people to follow the advice in their newspaper horoscopes,and finds that over six months most of them become happier.What is the main problem with this research?​

• A)Most scientists are skeptical of horoscopes.
• B)​The study has no control group.
• C)​The study has too many independent variables.
• D)​Six months is too short a time for a before-and-after study.

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Definitions:

Equilibrium Expression

A mathematical expression that relates the concentrations of the reactants and products at equilibrium in a reversible chemical reaction.

Reaction

A process in which one or more substances are changed into one or more different substances through the reorganization of atomic bonds.

Equilibrium Constant

A numerical value that represents the ratio of concentration of products to reactants at equilibrium in a reversible chemical reaction, under standard conditions.

Stability Constant

A quantitative measure of the stability of a complex in solution, typically represented in terms of the equilibrium constant for its formation.