Asked by Diandra
In a sample of 171, the mean is 58 with a population standard deviation of 4.8. Can someone help me figure out what is the 90% confidence interval of the true mean? Thank you.
Answers
Answered by
PsyDAG
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the Z score for .4500 from mean (Z = 1.645)
90% conf. Interval = mean ± 1.645(SEm)
SEm (Standard Error of the mean) = SD/?(n-1)
There is a difference if you want to find confidence intervals for distribution of scores or distribution of means.
90% conf. Interval = mean ± 1.645(SEm)
SEm (Standard Error of the mean) = SD/?(n-1)
There is a difference if you want to find confidence intervals for distribution of scores or distribution of means.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.