A teacher randomly chooses a two-person leadership team from a group of four qualified students. Three of the students, Sandra, Marta, and Jane, are girls. The fourth student, Franklin, is a boy.
Using the sample space of possible outcomes listed below, where each student is represented by the first
letter of his or her name, answer each of the following questions.
What is P(A), the probability that the first student is a boy?
What is P(B), the probability that the second student is a girl?
What is P(A and B), the probability that the first student is a boy and the second student is a girl?
Are events A and B independent?

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8

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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.