A simple random sample of size n is drawn from a population that is known to be normally distributed. The sample variance, s², is determined to be 128 Complete parts (a) through (c). CI (a) Construct a 90% confidence interval for o² if the sample size, n, is 20. The lower bound is. (Round to two decimal places as needed.) Question Viewer

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A simple random sample of size n is drawn from a population that is known to be normally distributed. The sample variance, s², is determined to be 12.8. Complete
parts (a) through (c).
(a) Construct a 90% confidence interval for o² if the sample size, n, is 20.
The lower bound is
(Round to two decimal places as needed.)
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Transcribed Image Text:S rary ons A simple random sample of size n is drawn from a population that is known to be normally distributed. The sample variance, s², is determined to be 12.8. Complete parts (a) through (c). (a) Construct a 90% confidence interval for o² if the sample size, n, is 20. The lower bound is (Round to two decimal places as needed.) Question Viewer To see what to study next. go to your Study Plan. a # Clear all Check answer 8:02 PM
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