Landon and his children went into a bakery and will buy donuts and brownies. Each donut costs $1 and each brownie costs $3. Landon has a total of $15 to spend on donuts and brownies. Write an inequality that would represent the possible values for the number of donuts purchased, d
d, and the number of brownies purchased,
b
.
b.

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.