Proportion of washing machines leaving the factory
A manufacturer wishes to estimate the proportion of washing machines leaving the factory that is defective. How large a sample should she check in order to be 93 percent confident that the true proportion is estimated to within 0.014?
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Determine the value of Z that would be used in developing an interval estimate of a population proportion where the confidence level to be used is 84%. Use the NORSMINV function.
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alculate the upper value (limit) of the confidence interval to estimate the population proportion if the sample size (n) was 1,953, a confidence level of 95% is desired (use z=1.96), and 125 (x) exhibited the attribute/characteristic you are inter
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