SOLUTION: a random sample of 31 juice drinks has a mean of 99.3 and a standard deviation 41.5 calories. Construct a 95% confidence interval for the population mean number of calories per jui

Algebra ->  Statistics  -> Confidence-intervals -> SOLUTION: a random sample of 31 juice drinks has a mean of 99.3 and a standard deviation 41.5 calories. Construct a 95% confidence interval for the population mean number of calories per jui      Log On


   

Question 958256: a random sample of 31 juice drinks has a mean of 99.3 and a standard deviation 41.5 calories. Construct a 95% confidence interval for the population mean number of calories per juice drink.
My problem is that i dont know how to plug the numbers into the equation, and which numbers should i worry about.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
a random sample of 31 juice drinks has a mean of 99.3 and a standard deviation 41.5 calories. Construct a 95% confidence interval for the population mean number of calories per juice drink.
--------------------------
sample mean = x-bar = 99.3
-----
Margin of Error = z*s/sqrt(n) = 1.96