Which of the following functions would best model the situation given above? example: bill is at tennis practice. he tosses a tennis ball into the air. as the tennis ball comes back down, he decides to hit it back into the air with his racket. bill notices that the tennis ball hits his racket m seconds after he originally tosses it. as the ball comes back down this time, he decides to catch it. when bill catches the ball, n seconds have passed since the ball hit his racket. the height of the ball at a given time is h feet. answer choices : a. absolute value b. polynomial c. step d. cube root

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.