5. A rectangular yard is fenced in using 320 feet of custom fence. Your friends really like the fence and decide to fence in their yard using the
same fence. Their yard is similar but has a scale factor of 8/5 times the size
of yours. How much fence (in feet) will they have to purchase?

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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.