statistics

The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping. Assume that the number of hours a worker spends doing holiday shopping on an office computer follows an exponential distribution.

Round your answers to four decimal places.

a.)The study reported that there is a .53 probability that a worker uses the office computer for holiday shopping 5 hours or less. Is the mean time spent using an office computer for holiday shopping closest to 5.5, 6, 6.6, or 7 hours?
The answer is 6.6.

b.)Using the mean time from part (a), what is the probability that a worker uses the office computer for holiday shopping more than 10 hours?

c.) What is the probability that a worker uses the office computer for holiday shopping between four and eight hours?

  1. 0
  2. 39
asked by Jenna
  1. If the mean = 6.6, then the probability density function is:
    f(x) = (1/6.6)e^(-x/6.6)

    P(x>10) = 1- int_{0}^{10} ((1/6.6)e^(-x/6.6))dx
    = e^(-10/6.6)
    ~ 0.2198

    P(4<x<8) = P(x>4) - P(x>8)
    = e^(-4/6.6) - e^(-8/6.6)
    ~ 0.2479

    posted by Nonetheless

Respond to this Question

First Name

Your Response

Similar Questions

  1. Keith

    The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping. Assume that the number of hours a worker spends doing holiday
  2. Statistics

    The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping (USA Today, November 11, 2009). Assume that the number of hours a
  3. stats

    The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping (USA Today, November 11, 2009). Assume that the number of hours a
  4. business

    Think about where your personal information is stored from an information systems perspective: - Is your credit card information saved on file at your favorite online store? - Are your medical records stored electronically at your
  5. college

    In general, think of ways that information systems add value to companies like Bead Bar, the company introduced on p. 2 of your text. How can information systems affect a company’s bottom line (such as financial performance)?
  6. accounting

    The board of trustees of a local church is concerned about the internal accounting controls pertaining to the offering collections made at weekly services. They ask you to serve on a three-person audit team with the internal
  7. accounting

    The board of trustees of a local church is concerned about the internal accounting controls pertaining to the offering collections made at weekly services. They ask you to serve on a three-person audit team with the internal
  8. ACCOUNTING

    P7-2B The board of trustees of a local church is concerned about the internal accounting controls pertaining to the offering collections made at weekly services. They ask you to serve on a three-person audit team with the internal
  9. government

    the "nerve center" of the executive office of the lpresident is the a. office of management and budget b. office of national drug control policy c. white house office d. council of economic advisers c
  10. health care

    Austin and Boxerman (2003) state that healthcare organizations have used information technology as a tool for automating processes, yet they submit that "project teams involved in systems analysis of healthcare information systems

More Similar Questions