In a sample of 60 stores of a certain company, 50 violated a scanner accuracy standard. It has been demonstrated that the conditions for a valid large-sample confidence interval for the true proportion of the stores that violate the standard were not met. Determine the number of stores that must be sampled in order to estimate the true proportion to within 0.04 with 90% confidence using the large-sample method. The number of stores that must be sampled is nothing. (Round up to the nearest whole number as needed)
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We want to estimate the true proportion of stores that violate the standard (p) within 0.04 with 90% confidence using the large-sample method. Show more…
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