Formula for the Confidence interval?

[khaled2reza]

Formula for the Confidence interval, assuming for a Sample whose standard deviation is same as Population.

I need to know the exact formula. I need to know if there is any square root of n in the denominator. Anyone who knows the formula please share.

 

[Dason]

Estimate +/- (margin of error)

 

[khaled2reza]

What would be the solution to this problem attached?

 

[khaled2reza]

anyone knows the solution? I am having confusion at the assumption part.

 

[rogojel]

Hi,
this is obviously a homework assignement: so, what do you think?

 

[khaled2reza]

Hi,
this is obviously a homework assignement: so, what do you think?

Hi,

I have the solution for this problem I dont understand the logic behind it. In the confidence interval formula, there is no root-n in the denominator. What is the reason?

 

[Dason]

Can you show the numbers you have for your answer

 

[khaled2reza]

Can you show the numbers you have for your answer

2.00008 ± 0.002038

 

[rogojel]

This is the interval 95% of the individual values will be contained in. To me it is a bit strange to call it a "confidence interval". The square n would come into the formula if you wanted to calculate the confidence interval of the population mean.

regards