Post a New Question

Behavioral Statistics

posted by .

I need someone to explain HOW to do this..I don't want just the answer I have got to figure out how to do this before my mid-term, and I'm completely clueless!

3. One of the major U.S. tire makers wishes to review its warranty for their rainmaker tire. The warranty is for 40,000 miles. The tire company believes that the tire actually lasts more than 40,000 miles. A sample 49 tires revealed that the mean number of miles is 45,000 miles with a standard deviation of 15,000 miles. Test the hypothesis with a 0.05 significance level.

Answer these questions:

3a) What is the H0? Null hypothesis, hypothesis about a population of the relationship among populations
3b) What is the H1? alternative hypothesis, hypothesis about parameters that is accepted if the null hypothesis is rejected
3c) What is the decision rule?
3d) What is the calculated value of z?
3e) What is your decision?

  • Behavioral Statistics -

    Ho: mean = 40,000

    H1: mean > 40,000

    Z = (score-mean)/SEm

    SEm = SD/√n

    Since you are only concerned with greater than 40,000, you will reject Ho if Z falls in the top 5%.
    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.

    I'll let you calculate Z and come to your own decision.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math.

    I JUST can't figure out the answer! Can someone please help me?
  2. Math!

    Factoring Completely! 13b^2-13 I got (13b-13)(1b-1). On my test my teacher said it was party wrong.And she underlined the two Thirteen's i had in my answer. And i don't understand why!?
  3. math,algebra

    can someone help me out factor out this 0=16t^2-122t+180 i have so far this but the last one i am not sure 8(2t^2-14t + ?
  4. Math

    8*2sq+7*(4+1)= ? Can someone explain to me what to after the parenthesis?
  5. wow...Phys...this has me COMPLETELY clueless

    it is a projectile motion question i just can't seem to figure out A ball is shot from the ground into the air. At a height of 9.1 m, its velocity is observed to be v = 7.6i + 6.1j m/s To what maximum height does the ball reach?
  6. statistics

    i have a question regarding statistics. i just don't know how to do it and would really appreciate if someone could tell how i can solve it. the question is; a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11 a) there …
  7. Psychology

    There are five major perspectives of psychology used to explain a human behavior and mental processes. These five perspectives that I am referring to are Neuroscience, Psychodynamic, Behavioral, Cognitive and Humanistic The instruction …
  8. Math

    Determine the sum of the first 20 terms of the arithmetic sequence in which ... f) the 7th term is 43 and the 13th term is 109 I know you can make two equations : 43 = a + 6d and 109 = a + 12 d And subtract them to get d = 11 But I …
  9. U.S. and Global Economics

    I'm in need of help really bad. I been sitting here( I got a serious butt ache) trying to figure out this answers and I only got question one. Plz at least explain these questions to me. I would highly appreciate it. :) you don't need …
  10. math practice help

    add or subtract (2x^2+6x+1)+(-7x^2+2x-3) 5x^2-4x-2 -5x^2+8x-2 5x^2-8x+2 -9x^2-8x+2 (3x^2-7x-4)-(6x^2-6x+1) -3x^2-x-5 -3x^2-13x+5 9x^2-x+5 3x^2-13x-5 These are just practice problems. could someone help me figure out how to solve them …

More Similar Questions

Post a New Question