You wish to test whether a particular drug manages to bring body temperature down. So, you conduct a pilot study where 35 people receive the drug, and 40 people receive a placebo.  The body temperatures of patients from the treatment group are group 1 (variable X1);  those from the placebo group are group 2 (variable X2).   What is the research hypothesis? Group of answer choices a. Ha: mu1 < mu2 b. Ha: mu1 > mu2 c. Ha: mu1 = mu2 d .Ha: mu1 ≠ mu2

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.