Final answer:
Researchers expect a treatment to result in increases, decreases, or no change. Specific outcomes, like an increased myocardial contraction from a positive inotrope or decreased interest rates from a rise in money supply, are anticipated. Proper analysis is needed to confirm treatment effectiveness.
Step-by-step explanation:
When a researcher administers a treatment, they expect to observe an effect on the subject that could manifest as increases, decreases, or result in no change. For example, a positive inotrope is expected to increase the force of myocardial contraction, hence affecting heart function. Similarly, in financial markets, a rise in the supply of money, assuming demand remains constant, will usually lead to a decline in interest rates. In a scientific study involving drug treatments, if the average decrease in tumor size in a drug-treated group is larger than that in the untreated group, this initially suggests that the drug may be effective. However, the scientist cannot make a definitive conclusion without further statistical analysis to rule out the placebo effect or other confounding variables.