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confidence interval

S

shdh

Ton up Member
Can someone please explain to me how did we get the value of 1.96 in the confidence interval (x bar)±(standard deviation)/√n in PDF page 454.

How do we read these data off from the tables?
Suppose for 99% confidence interval how do we find out the corresponding value?

Thank you for your time and your response.
 
95% confidence interval means 2.5% either side. Read these values from page 162 of the Tables.
 
Thank you sir for your reply. I understood the concept by solving further sums. Thanks once again.
 
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