szamy004
Aug 26, 2009, 05:04 AM
hi can you please help me I have a few questions but this one is important
The quoted mean number of milligrams of sodium in a certain brand of low-salt microwave frozen dinners is 670mg. A random sample of 46 dinners is selected and found to have a mean of 685mg and standard deviation is 29mg.
a. Using the sample statistics, find a 90% confidence interval estimate of the true population mean number of milligrams of sodium in this brand of low-salt microwave frozen dinners.
I don't know how to work it out, and am getting confused with what formula to use.
help would be great please.
The quoted mean number of milligrams of sodium in a certain brand of low-salt microwave frozen dinners is 670mg. A random sample of 46 dinners is selected and found to have a mean of 685mg and standard deviation is 29mg.
a. Using the sample statistics, find a 90% confidence interval estimate of the true population mean number of milligrams of sodium in this brand of low-salt microwave frozen dinners.
I don't know how to work it out, and am getting confused with what formula to use.
help would be great please.