Susan is buying three different colors of tiles for her kitchen floor. she is buying 25 more red tiles than beige tiles, and three times as many navy-blue tiles as beige tiles. if susan buys 435 tiles altogether, how many tiles of each color does she buy?

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.