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You have been asked to observe the shift supervisor at the process test plant for Hudson Chemical Co.to estimate the proportion of time she spends answering questions for the operators.Your 30 observations have revealed the following:
(a)Based on the preliminary data,calculate the proportion of time she spends answering questions for the operators.
(b)Calculate the sample size needed to estimate the proportion of time she spends answering questions for the operators.Assume a 90% confidence that the results will lie within 5% of the true value.
Notes Receivable
Written promises for amounts to be received by a business, typically with interest, from other parties or customers.
Allowance Method
An accounting technique used to estimate and account for doubtful debts, recognizing potential losses from accounts receivable that may not be collected.
Uncollectible Accounts
Accounts receivable that a company does not expect to collect and writes off as an expense.
Sales
The total amount of goods or services sold by a company during a specific period.
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