A Company Is Interested in Estimating ,The Mean Number $\mu$

question 15

Multiple Choice

A company is interested in estimating ,the mean number of days of sick leave taken by its employees.The firm's statistician randomly selects 100 personnel files and notes the number of sick days taken by each employee.The sample mean is 12.2 days and the sample standard deviation is 10 days.How many personnel files would the director have to select in order to estimate $\mu$ to within 2 days with a 99% confidence interval?

• A)2
• B)13
• C)136
• D)165
• E)166

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Analyze the financial leverage through the equity multiplier, debt-to-equity ratio, and times interest earned ratio to understand a company's financial structure and risk.

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Understand the significance and computation of dividend-related ratios such as dividend payout ratio and dividend yield ratio.

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