A Group Of Medical Researchers Investigated The Effect

CLEANED: A group of medical researchers investigated the ef

A group of medical researchers investigated the effects of a drug called Pressure Drop X on lowering blood pressure in a group of women between the ages of 60 and 80 years old. The researchers did the following experiment and obtained the indicated results: One group of 150 women took a tablet containing Pressure Drop X for 3 weeks – 95 of these women experienced decreased blood pressure by at least 10%. Another group of 150 women were given a tablet with no added Pressure Drop X for 3 weeks – 10 of these women decreased their blood pressure by 10%. What are the controlled variables in this experiment?

Paper For Above instruction

This experiment aims to identify the variables that are intentionally kept constant to ensure that the effects observed—specifically, the reduction in blood pressure—are attributable solely to the drug Pressure Drop X. The controlled variables are those factors that could influence the outcome if varied but are deliberately kept steady throughout the experiment.

In this particular study, several potential variables could influence blood pressure outcomes. These include the dosage of Pressure Drop X, the duration of administration, and the demographic characteristics of the participants such as age, gender, or health status. Since the study particularly focuses on women between 60 and 80 years old, age and gender are inherently controlled by the selection criteria. The experiment maintains a standardized duration of three weeks for all participants, ensuring the time period does not vary. Additionally, the sample size for each group—150 women—remains constant, controlling for sample size effects. The consistency in these factors helps isolate the effect of the drug itself on blood pressure, ensuring that the difference in responses between the groups is due to the presence or absence of thePressure Drop X in the tablets.

Among the options provided, the most appropriate controlled variables are the age and gender of the participants, the 3-week time period, and the sample size. These variables are deliberately kept consistent to ensure that the primary variable being tested is whether the drug Pressure Drop X influences blood pressure reduction. Variations in these aspects could introduce confounding factors, potentially skewing the results. For example, different age groups or genders might have different tendencies for blood pressure changes, and varying the duration or sample size could impact the statistical validity of the results. Therefore, controlling for age, gender, time period, and sample size ensures the experiment's internal validity and strengthens the causal inference that pressure drop X affects blood pressure.

In conclusion, controlling variables such as the age and gender of participants, the duration of the experiment, and the sample size is essential to accurately assess the effect of Pressure Drop X on blood pressure in this study. These controls allow researchers to attribute differences in blood pressure outcomes specifically to the drug itself, minimizing confounding influences and ensuring the experiment's validity.

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