The williams family wants to buy these toys. they have $20 bills, $10 bills, $5 bills, and l bills. they want to use the least number of bills to pay for each item which bills will they use to pay for each item? doll cost $18, bicycle cost $83, and basketball cost $49. how can you find the least number of bills to use to pay for any of the 3 items?

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.