Answered

Discover the best answers at Westonci.ca, where experts share their insights and knowledge with you. Join our platform to get reliable answers to your questions from a knowledgeable community of experts. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.

a. A test consists of 20 multiple choice questions, each with 5 alternatives for the answer. A student has not studied for the test, so she chooses the answers at random. Let X be the discrete random variable that describes the number of correct answers.
i. Determine the expected number of correct questions answered.
ii. Determine the standard deviation of the correct number of questions answered, correct to 4 decimal places.

b. A binomial random variable, Z, has a mean of 8.4 and a variance of 3.696.
i. Determine the probability of success, p.
ii. Determine the number of trials, n.

Sagot :

Thank you for choosing our service. We're dedicated to providing the best answers for all your questions. Visit us again. We hope you found what you were looking for. Feel free to revisit us for more answers and updated information. We're glad you chose Westonci.ca. Revisit us for updated answers from our knowledgeable team.