Which statement is true about figures ABCD and A′B′C′D′? A′B′C′D′ is obtained by rotating ABCD counterclockwise by 180 degrees about the origin and then reflecting it across the x-axis.

A′B′C′D′ is obtained by translating ABCD 2 units up and then reflecting it about the y-axis.

A′B′C′D′ is obtained by translating ABCD 2 units up and then reflecting it about the x-axis. A′B′C′D′ is obtained by rotating ABCD

counterclockwise by 180 degrees about the origin and then reflecting it across the y-axis.

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.