Suppose you have selected a random sample of ?=13 measurements
from a normal distribution. Compare the...
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Suppose you have selected a random sample of ?=13 measurementsfrom a normal distribution. Compare the standard normal z valueswith the corresponding t values if you were forming the followingconfidence intervals.
a) 80% confidence interval ?= ?=
(b) 90% confidence interval ?= ?=
(c) 99% confidence interval ?= ?=
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Solution Given thata At 80 confidence level the z is 1 80 1 080 020 2 020 2 001Z2 Z001 2326n 13Degrees of freedom
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