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?
6 answers
http://davidmlane.com/hyperstat/z_table.html
Even though u shown me Damon but how would the formula be set up I just want to know for future reference
mean = 2.34
sd = .2
z = + or - .03/.2
look for probability of being within z = +/- .15 of mean
sd = .2
z = + or - .03/.2
look for probability of being within z = +/- .15 of mean
Soo Damon do I plug in the mean within the problem cause I'm still lost
Or Damon do I divide .03/2 to come up with -/+ answers?
Now Damon I figure out that soo now do I take the mean and the probability and divide that again?
1 answer