Wednesday

July 23, 2014

July 23, 2014

Posted by **Shannon** on Sunday, February 12, 2012 at 11:35pm.

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 -
**PsyDAG**, Monday, February 13, 2012 at 1:43pmZ = (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.

**Related Questions**

Tutor - does anyone know where i can get a free interactive online tutor? I don'...

accounting - How do I set this problem up to do it? I do not want the answer ...

Programming - Hi. I am taking a computer programming class (C++). I need some ...

Satistics - Is this problem correct Answer: 0.90^5 = 0.6562

College Algebra - I could not figure out the answer to this Problem: The ...

business satistics - a set of integers consists of 2,3,5,7,11,12,x. if x is ...

Geometry MATH CHECK - Check? In your own words, explain why we use the formula ...

Pre-Calculus - Hello! I'm stuck on how to do this problem and would appreciate ...

Pre-Calc - Hello! I'm stuck on how to do this problem and would appreciate some ...

Science - Sir, I am Raveesh, I have done my M.Sc in Botany and B.Ed in Chemistry...