The principal at Richmond High School is planning the graduation ceremony for this year. Last year, it
took her 50 minutes to hand out diplomas to 250
graduates. This year, there are 300 graduates.
If the principal hands out diplomas at the same
rate, how long will it take to hand out diplomas at
this year's ceremony?

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.