A string of holiday lights at a store have three colors that flash at different times. Red lights flash every six second. Blue lights flash every four seconds. Green light flashes every two seconds. The store owner turns on the lights. After how many seconds will all three lights flash at the same time for the first time? A- 10 sec

B- 8 sec

C-12 sec

D-2 sec

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.