Practice Test 3_Bus2023_spring09_solutions

Practice Test 3_Bus2023_spring09_solutions - Practice Test...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Practice Test 3 –Bus 2023 Directions: For each question find the answer that is the best solution provided. There is only one correct answer. 1. A random variable that can assume only a finite number of values is referred to as a(n) a. infinite sequence b. finite sequence c. discrete random variable d. discrete probability function ANSWER: c 2. The number of customers that enter a store during one day is an example of 3. An experiment consists of measuring the speed of automobiles on a highway by the use of radar equipment. The random variable in this experiment is speed, measured in miles per hour. This random variable is a 4. A measure of the average value of a random variable is called a(n) 5. The expected value for a binomial probability distribution is a. E( x ) = pn (1 - n ) b. E( x ) = p (1 - p ) c. E( x ) = np d. E( x ) = np (1 - p ) ANSWER: c 1
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
6. The variance for the binomial probability distribution is 7. Assume that you have a binomial experiment with p = 0.4 and a sample size of 50. The variance of this distribution is 8. Twenty percent of the students in a class of 100 are planning to go to graduate school. The standard deviation of this binomial distribution is Exhibit 5-8 The student body of a large university consists of 60% female students. A random sample of 8 students is selected. 9. Refer to Exhibit 5-8. What is the random variable in this experiment? a. the 60% of female students b. the random sample of 8 students c. the number of female students out of 8 d. the student body size ANSWER: c
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern