Consider a normal population distribution with the value of known a What is the confidence level for the interval 2 81 n b What is the confidence level for the interval 1 44 n c What value of za 2 in the CI formula (7 5) results in a confidence level of 99 7 d Answer the question posed in part (c) for a confidence level of 75

Question: Consider a normal population distribution with the value of known. a. What is the confidence level for the interval 2.81 /n? b.

Consider a normal population with the value of σ known.
a. What is the confidence level for the interval ± 2.81 σ/√n?
b. What is the confidence level for the interval ± 1.44 σ/√n?
c. What value of za/2 in the CI formula (7.5) results in a confidence level of 99.7%?
d. Answer the question posed in part (c) for a confidence level of 75%.

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a z 2 281 implies that 2 1 281 0025 so 005 and the confidence level is 1001 995 ... View full answer

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