An investor has $80,000 to invest in a cd and a mutual fund. the cd yields 8% and the mutual fund yields 6%. the mutual fund requires a minimum investment of $9,000, and the investor requires that at least twice as much should be invested in cds as in the mutual fund. how much should be invested in cds and how much in the mutual fund to maximize the return? what is the maximum return?

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.