SOLUTION: If we wish to have a 99% confidence interval, what would be
the value of the confidence coefficient: z(a/2)?
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I did th
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-> SOLUTION: If we wish to have a 99% confidence interval, what would be
the value of the confidence coefficient: z(a/2)?
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I did th
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Question 662429: If we wish to have a 99% confidence interval, what would be
the value of the confidence coefficient: z(a/2)?
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I did this... It is a Two-Tailed situation: z(a/2)=z(0.025)=1.96
am I right or am I wrong?
Hi,
Re TY
99% confidence interval
Two-Tailed
z(.01/2)=z(.005)= 2.576
If we wish to have a 99% confidence interval in a Two-Tailed situation
what that is saying is that a 'z' found to fall in the critical regions...
that is z<-2.576 Or z >+2.576 falls outside the confidence interval.
Each confidence interval has its own critical regions as shown below.
a a/2 critical regions
80% 0.2 0.100 z <-1.282 z >+1.282
90% 0.1 0.050 z <-1.645 z >+1.645
92% 0.8 0.040 z <-1.751 z >+1.751
95% 0.05 0.025 z <-1.96 z >+1.96
98% 0.02 0.010 z <-2.326 z >+2.326
99% 0.01 0.005 z<-2.576 z >+2.576