Help please! :) For each statement, provide an example showing that the statement can be true, or an explanation of why the statement can never be true.

a. Adjacent angles can be complementary.

b. Vertical angles can be slupplementary.

c. Complementary angles can be supplementary.​

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.