Jessica is planning a trip to South Africa. The following table shows some of her planned expenses for this trip, and whether these expenses are in US dollars ($) or South African rands (R). Item Cost Currency Guide book 216.41 R Walking shoes 702.33 R Passport 71.75 $ Car rental 996.78 R Plane ticket 3,741.85 R Hotel reservation 138.10 $ If the exchange rate of US dollars to South African rands is 1:7.4094, what is the current total of Jessica’s budget, in US dollars? Round all currencies to two decimal places. a. $763.54 b. $791.86 c. $973.39 d. $1,001.71

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.