Friday

January 30, 2015

January 30, 2015

Posted by **Jerome** on Sunday, June 23, 2013 at 5:00pm.

What is the probability that the mean fuel cost is between $2.84 and $2.86?

- Statistics -
**MathGuru**, Sunday, June 23, 2013 at 6:43pmUse z-scores.

Formula for this problem:

z = (x - mean)/(sd/√n)

Find two z-scores, using 2.84 for x and also 2.86 for x. Mean = 2.835 and sd = 0.15. Sample size n = 100.

Once you find the two z-scores, use a z-distribution table to determine your probability between the two z-scores.

**Answer this Question**

**Related Questions**

statistics - according to the energy information administration (officially ...

statistics - The average price of a gallon of unleaded regular gasoline was ...

statistics - please help me I've waited for hours The average price of a gallon ...

economics - 1. Consider the following four debt securities, which are identical ...

Statistics - he Oil Price Information Center reports the mean price per gallon ...

finance - Consider the following four debt securities, which are identical in ...

STATISTICS HELP!!!!!!! - Statistical Abstracts (117th edition) reports sale ...

College statistics - Statistical Abstracts (117th edition) reports sale price ...

Satistics - **I don't want the answer, I want to know how to set the problem up ...

4th grade math - unleaded regular - $1.89 per gallon unleaded premium - $1.94 pr...