compute a 95% confidence interval

[WlND]

A standardized test is used to assess students emotional intelligence (national reported mean=70). A sample of 10 students are tested with sample mean score of 65 , and a variance of 12). Compute a 95 percent confidence interval based on this sample's data.

(12/10)^(1/2)=1.095

65-1.96(1.095), 65+1.96(1.095)
62.86, 67.15

is that correct?

thanks

 

[DrPhil]

A standardized test is used to assess students emotional intelligence (national reported mean=70). A sample of 10 students are tested with sample mean score of 65 , and a variance of 12). Compute a 95 percent confidence interval based on this sample's data.

(12/10)^(1/2)=1.095

65-1.96(1.095), 65+1.96(1.095)
62.86, 67.15

is that correct?

thanks

Yes.