# Statistics help - 95% Confidence Interval
Asked Oct 10, 2011, 06:51 PM
—
| Senior in college trying to survive statistics.
I am not asking for the answer, just please help me understand what I'm doing.
I have a sample size of 50, with a mean of 89.14, a population mean of 100 and SD of 25.
Alpha is .05. How do I find the 95% confidence interval? What is a confidence interval? Please help. | ##
Check out some similar questions!
Statistics using confidence interval [ 2 Answers ]
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....
95% confidence interval [ 2 Answers ]
39 nuts are gathered. They have an average size of 3.34 cent and a standard deviation of .45 cent. Find the 95% confidence interval for the mean size of all the nuts
Confidence interval [ 3 Answers ]
A sample of the math test scores of 35 fourth-graders has a mean of 82 with a standard deviation of 15.
Find the 95% confidence interval of the mean math test cores of all fourth-graders.
Find the 99% confidence interval of th mean math test scores of all fourth-graders
Which interval is...
View more questions Search Question Tools | Search this Question | | | ### Add your answer here. |