Consider a normal population distribution with the value of known. a) What is the confidence level for the interval (i) x 1.96 n (ii) x 2.65 n (iii) x 3.34 n b) What value of z in the confidence interval formula x z n x z n 2 2 , results in a confidence level of (i) 97.96% (ii) 78.88% (iii) 99.94% c) Would a 90% C.I. be narrower or wider than the 99.94% C.I. in b)? Why?
Answer :
A) i) for z= 1.96, confidence level = 95%
ii) 99.20%
iii) 99.92%
B) i) 2.0456
ii) 0.8023
Iii) 3.2389
C) 90% CI is narrower than 99.94% , because greater the confidence level, the greater the range of aoproximation would be.
Consider a normal population distribution with the value of known. a) What is the confidence...
PLEASE SHOW ALL THE WORKING Consider a normal population distribution with the value of known. a) What is the confidence level for the interval (i) x 1.96 n (ii) x 2.65 n (iii) x 3.34 n b) What value of z in the confidence interval formula x z n x z n 2 2 , results in a confidence level of (i) 97.96% (ii) 78.88% (iii) 99.94% c) Would...
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Each of the following is a confidence interval for μ = true average (i.e., population mean) resonance frequency (Hz) for all tennis rackets of a certain type: I will rate the answer, thank you! 6. -110 points DevoreStat9 7.E.002. My Notes Ask Your Teacher Each of the following is a confidence interval for μ = true average (ie, population mean) resonance frequency (Hz) for all tennis rackets of a certain type: (113.6, 114.4) (113.4, 114.6) (a) What is the value...
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