Question

- A researcher is interested in comparing two medications in order to see which contributes to the greatest decrease in symptoms as measured by an instrument on a scale of 0-100. The researcher recruits three groups of participants, one who receive medication A, one group of participants who receive medication B, and a control group who receives a placebo.

A. What type of study design is this (descriptive, correlational, or experimental)?

B. What would be the appropriate statistical analysis to use in that situation (Chi-Square, Pearson correlation, one sample t-test, paired samples t-test, independent samples t-test, or ANOVA)?

Answer #1

A. This is an experimental study of design . Because experimental design includes the way the treatments were adjusted to subjects and hoe subjects were grouped for analysis. Here the patients are divided into three groups according to their treatments so it's a experimental design.

B . Anova is the appropriate statistical analysis.

Anova models are used to compare the mean response values of different level of factor. Here the factor is patients where the levels are different treatments. So we compare the mean response of these levels to see whether they differ from one another .

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