Math - Probability

You invent a new system to make excellent racing tires for the Indianapolis 500/ Your tires are good for an average of 105 miles, with a standard deviation of 7.5 miles. What is the probability that one of your tires can go for at least 44 laps? What is the probability that one of your tires will fail before the end of 36 laps?

  1. 👍 0
  2. 👎 0
  3. 👁 42
asked by Laura
  1. How far is a lap?

    1. 👍 0
    2. 👎 0
    posted by Reiny
  2. One lap is 2.5 miles.

    Sorry, meant to include that before.

    1. 👍 0
    2. 👎 0
    posted by Lindsey
  3. so 44 laps = 44(2.5) or 110 miles
    36 laps = 90 miles

    enter your values in
    http://davidmlane.com/hyperstat/z_table.html

    enter 110 for 44 laps in "above" ---> .2525
    enter 90 and click on "below" ------> .02275

    1. 👍 0
    2. 👎 0
    posted by Reiny

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    You invent a new system to make excellent racing tires for the Indianapolis 500/ Your tires are good for an average of 105 miles, with a standard deviation of 7.5 miles. What is the probability that one of your tires can go for at

    asked by Lindsey on July 10, 2012
  2. Physics

    I have to compare and contrast three types of tires, and relate them to physics. I've chosen: Racing tires Winter tires All season tires I've chosen to compare them on: Tire tread pattern Rubber compound ??? As you can see, I need

    asked by Lucy on March 1, 2008
  3. Physics

    The total area of contact between the tires of a racing bicycle and the road is 1.5 square inches. The bicycle and its rider weigh 171 pounds. What is the air pressure inside its tires?

    asked by Kristen on April 18, 2011
  4. Physics

    The total area of contact between the tires of a racing bicycle and the road is 1.5 square inches. The bicycle and its rider weigh 171 pounds. What is the air pressure inside its tires?

    asked by Kristen on April 18, 2011
  5. physics

    The total area of contact between the tires of a racing bicycle and the road is 1.5 square inches. The bicycle and its rider weigh 171 pounds. What is the air pressure inside its tires?

    asked by Kristen on April 18, 2011
  6. physics

    The tires of a car make 58 revolutions as the car reduces its speed uniformly from 92 to 33 . The tires have a diameter of 0.86 . What was the angular acceleration of the tires? If the car continues to decelerate at this rate, how

    asked by juana on May 26, 2011
  7. business

    Rocky Mountain Tire Center sells 20,000 go cart tires per year. The ordering cost for each tire is $40, and the holding cost is 20% of the purchase price of the tires per year. The purchase price is $20 per tire if fewer than 500

    asked by Gin on March 30, 2011
  8. Math

    The speedometer of John's truck uses the revolutions of his tires to calculate the speed of the truck. How many revolutions per minute do the tires make when the truck is traveling at 55 miles per hour? (picture with tires with

    asked by Gabi on May 11, 2011
  9. Probability and Statistics 2

    Bad Wheels Tire Company is interested in estimating the proportion of defective tires that it produces. The company tested a sample of 500 tires and found 16 to be defective. Find a 99% upper bound confidence interval for the true

    asked by Kim on April 29, 2012
  10. Math

    Twenty tires are tested to see if they last as long as the manufacturer claims they do. Three tires fail the test. Two tires are selected at random without replacement for an inspection. Find the probability that both tires fail

    asked by Steve on June 2, 2014

More Similar Questions