Recent content by annehenderson

1. Margin of Error of a Confidence Interval

my confidence interval is 162.6, so would i add and subtract 2.4 to it and that would be my margin of error? (i got the 2.4 from textbook, there was a little blurb on using 2.4 to creat margins of error) that's kind of the only thing i can think of since the length of my confidence interval is...
2. Margin of Error of a Confidence Interval

to create a confidence interval you add and subtract the x-bar with the margin of error, correct?
3. Margin of Error of a Confidence Interval

Hey all, So I have a question that asks to find the margin of error from a confidence interval for a population mean, the confidence interval has a length of 162.6. The only way I can find to obtain the margin of error is with zalpha/2 x standard deviation/ square root of n and I don't have any...
4. How to find the probability of a sampling error made in estimating the population mean?

thank you for your reply! so how would i find the z-score since i am not given an x? the only formula i know for finding z-scores is subtracting x by the mean and dividing that by the standard deviation. my professor hasn't gone over anything about p-values or null hypothesis either so i'm not...
5. How to find the probability of a sampling error made in estimating the population mean?

Alright, I have been working on my statistics assignment since Monday and I only have two questions left, dealing with the probability of a sampling error. Unfortunately, I cannot find anything in my notes and only a brief example in my textbook that does not explain the concepts behind the...