At the beginning of the fall, the water level of a lake is 1113 feet below normal level. After a drought, the lake's water level dropped 723 feet. Where is the lake's current water level in relation to its normal water level? 3 23 feet
19 feet
-3 23 feet
-19 feet

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.