Question

The average price of a gallon of unleaded regular gasoline was reported to be $2.34 in Northern Kentucky use this price as a population mean population standard deviation is $.20. question. what is the probability that the mean price for a sample of 30 station is good then $.03 of the population mean?

Answer 1

http://davidmlane.com/hyperstat/z_table.html

Answer 2

Even though u shown me Damon but how would the formula be set up I just want to know for future reference

Answer 3

mean = 2.34

sd = .2

z = + or - .03/.2

look for probability of being within z = +/- .15 of mean

Answer 4

Soo Damon do I plug in the mean within the problem cause I'm still lost

Answer 5

Or Damon do I divide .03/2 to come up with -/+ answers?

Answer 6

Now Damon I figure out that soo now do I take the mean and the probability and divide that again?