An author receives a contract from a publisher according to which he is to be paid a fixed sum of $1200 plus $0.95 for each copy of his book sold. His uncertainty about total sales of the book can be represented by a random variable with a mean of 4100 and a standard deviation of 500. Find the mean and standard deviation of the total payments he will receive.

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.