statistics

A sample of 40 CDs from a student's collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes. Construct a 95% confidence interval for the population standard deviation. (Round your answers to 4 decimal places.)

  1. 👍 0
  2. 👎 0
  3. 👁 262
  1. You might try a formula like this one:

    s/(1 + 1.96/√2n) to s/(1 - 1.96/√2n)

    Substitute and calculate. There may be other variations of similar formulas you can use as well.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    Find the number of each kind of object in the collection Miranda has 24 CDs in her collection. Of those CDs, 10 are pop CDs. She has 6 more country CDs than jazz CDs. How many country CDs does Miranda have?

    asked by Dee on March 1, 2013
  2. Math

    Tell whose CD collection has the greater ratio of rock CDs to total CDs. Glen has 9 rock CDs, 4classical CDs, and 5 other kind of CDs. Nina has 12 rock CDs, 8 classical CDs, and 7 other kind of CDs.

    asked by Viviana on December 5, 2012
  3. Math

    How do I set this up and solve it? Tom has a collection of 30 CDs and Nita has a collection of 15 CDs. Tom is adding 1 CD a month to his collection while Nita is adding 4 CDs a month to her collection. Find the number of months

    asked by Mary on January 27, 2012
  4. Algebra

    Currently, Jodi has a collection of 44 CDs and Veronica has a collection of 22 CDs. Jodi is adding 2 CDs per month to her collection; Veronica plans to add 4 CDs per month. a. Write a system of equations for this situation.

    asked by TEri on February 15, 2012
  5. Statistics

    Please help!! I have no idea how to do this question. 14. A sample of 40 CD’s from your collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes a. Construct the 95 percent confidence interval

    asked by Kristi on October 31, 2011
  1. math

    I believe the answer is 5 months; however, I did it the long way. Explain how to find the answer. Tom has a collection of 30 CDs and Nita has a collection of 15 CDs. Tom is adding 1 CD a month to his collection while Nita is

    asked by Jane on December 31, 2011
  2. Math

    tom has a collection of 50 cds and nita has a collection of 38 cds. Each month tom adds two cds and nita adds four how many months will it take until they have the same amount?

    asked by Terri on January 30, 2013
  3. MATH

    A student who wants to buy 3 CDs, but assume that there are 6 CDs featuring the piano, 3 CDs featuring the trumpet, and 5 CDs featuring the saxophone. In how many ways can the selection be made if CD's featuring at least 2

    asked by Anonymous on February 15, 2013
  4. Finite: College Math

    A student wants to buy 3 CDs, but assume that there are 6 CDs featuring the piano, 4 CDs featuring the trumpet, and 7 CDs featuring the saxophone. In how many ways can the selection be made if CD's featuring at least 2 different

    asked by Laura on January 20, 2012
  5. Finite

    the student wants to buy 3 CDs, but assume that there are 3 CDs featuring the piano, 5 CDs featuring the trumpet, and 7 CDs featuring the saxophone. (2) In how many ways can the selection be made if CD's featuring at least 2

    asked by Chelsea P on January 28, 2013

More Similar Questions