A survey based on a stratified sample produced the following information: (a) Find a 90 % confidence
Question:
A survey based on a stratified sample produced the following information:
(a) Find a 90 % confidence interval for the population mean.
(b) Find a 95 % confidence interval for the population proportion.
Transcribed Image Text:
Stratum N n XX 1 1,900 30 22.6 5.2 0.3 2 3,000 51 40.5 4.1 0.1 3 3.500 72 28.7 7.4 0.2 4 4,200 65 22.5 3.8 0.3 5 4,100 83 25.4 5.1 0.4 PP where x, s, and pare the sample mean, sample variance, and sample proportion, respectively.
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Related Book For
Statistics For Business And Financial Economics
ISBN: 9781461458975
3rd Edition
Authors: Cheng Few Lee , John C Lee , Alice C Lee
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