Satistics

posted by .

**I don't want the answer, I want to know how to set the problem up and the formula that I need to use. I am online with a tutor right now, and they can't help me. :-(

The average price of a gallon of unleaded regular gasoline was reported to be $2.34 in northern Kentucky (The Cincinnati Enquirer, January 21, 2006). Use this price as the population mean, and assume the population standard deviation is $.20.

1. What is the probability that the mean price for a sample of 30 service stations is within $.03 of the population mean (to 4 decimals)?

  • Satistics -

    Z = (score-mean)/standard error of the mean (SEm)

    Scores = (mean-.03) and (mean+.03)

    SEm = SD/√n

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z scores.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Science

    Sir, I am Raveesh, I have done my M.Sc in Botany and B.Ed in Chemistry and Biology. Now i am working as a Lecturer in a college from last 2 years. I really interested to do online tutoring as a TUTOR / e-tutor. But I don't know how …
  2. Tutor

    does anyone know where i can get a free interactive online tutor?
  3. Programming

    Hi. I am taking a computer programming class (C++). I need some help on some programs. I tried going to my teacher - he was of no help and there are no tutors. I have a lot of code, but I'm having problems. I looked online for help, …
  4. Math(check)

    Solve 1= (y+3)(2y-2) Use foil on the right side. 1 = 2y^2 +6y -2y -6 so 1 = 2y^2 +4y -6 Now subtract 1 from boths sides giving us 0 = 2y^2 +4y -7 Now we need two numbers that multiply to be 2*(-7) or -14 and add to be 4. There doesn't …
  5. accounting

    How do I set this problem up to do it? I do not want the answer just the formula. The question is for Present Value, Future Value, and Annuity Due: . Your uncle offers you a choice of $30,000 in 50 years or $95 today. If money is discounted
  6. MATH/ALGEBRA PLEASE

    I am having a real issue with this one problem the problem is : y=1/3x-3 I am supposed to graph the problem and then find the y intercept. First I substituted x with 12. Y=1/3(12)-3 s divided by 12 is 4, now I subtract 3from 4 and …
  7. algebra

    I need to know if I am doing this problem right when sustitution method. y+2x=3 y+2x=-4 y+2x=3 -1(y+2x=3)-y-2x=-4 now add the two equation y-2x=3 -y-2x-4 the answer would be -4y=7 then divided -4=7 answer 1.75 I no that there is more …
  8. Geometry MATH CHECK

    Check? In your own words, explain why we use the formula AB = |a - b| to find the distance of a segment. Include why you need to subtract and why you need to take the absolute value. We use that formula |a-b| because a and b are representing
  9. Any math tutor online? Help

    Two companies charge these rates for printing a brochure : Company A charges $175 for set up and 0.10 pet brochure Company B charges $250 for set up and 0.07 pee brochure A linear system that model this situation is C=175 + 0.10n C …
  10. chemistry

    I'm confused on number 6 on the take home test. in this problem are we going to use the heat capacity of calorimeter is 2.21kJ/c. I'm confused on how to set this problem up 1)I converted 1.000kg in to grams= 1000g 2) I used q=m*c* …

More Similar Questions