Exam 2a Fa 05 KEY - ECON 2843 010 Exam 2 Fall 2005 Form A...

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

View Full Document Right Arrow Icon
ECON 2843 – 010 Name KEY Exam 2 ID # Fall 2005 Lab Instructor Form A Lab Meeting Time Students must show all work on problems that involve calculation, even if the answer is multiple choice. Questions 1 – 3 refer to the following. The gestation periods for calves can be represented by the normal distribution with a mean of 281 days and a standard deviation of 5 days. Assume that the actual gestation periods for the next 60 calves to be born is a random sample from this population. 1. What is the probability that the mean of this sample will lie between 279 and 280 days? a. .0596 * b. .0761 c. .20 d. .9239 e. .9404 2. What is the probability that the sample mean for the 60 calves will differ from the population mean by more than 1 day? ______.121___ ____ 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
3. The probability is .05 that the sample variance will be less than what number? (Note: Use the closest row in the table to approximate the degrees of freedom.) a. .90 b. 4.28 c. 6.57 d. 18.3 * e. 43.19 Questions 4 - 5 refer to the following: A survey was taken of U.S. firms regarding the number of years that they have been trading with firms in India. A random sample of 44 responses to this question yielded a mean of 10.455
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