Don't understand how to perform two-sided 95% confidence interval

Statistics
Tutor: None Selected Time limit: 1 Day

I have a problem where we have to form a two-sided 95% confidence interval. Our textbooks is practically useless. Help!

Jun 8th, 2015

Thank you for the opportunity to help you with your question!

in most cases confidence interval is taken as 95% This depends on the parameters and error model

This value  has a significance  because it gives impression of the perecision  of parameter estimate

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 8th, 2015

I know what it is. I don't understand a particular problem asking me to form a two-sided confidence interval. I am given the mean age of participants in a study, which is 31.5 years, and standard deviation, which is 10.2. Based on this, I found one standard error to be 1.33. However, I understand, from my book, that a Z score would be next, but I don't know how to find μ.

Jun 8th, 2015

I guess I don't even understand what it's asking. Is it asking for the interval in which the researching is 95% confident the population mean will fall under?

Jun 8th, 2015

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Jun 8th, 2015
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Jun 8th, 2015
Dec 4th, 2016
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