A Company Is Interested in Estimating μ, the Mean Number

question 146

Multiple Choice

A company is interested in estimating μ, the mean number of days of sick leave taken by its employees. Their 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 statistician have to select in order to estimate μ to within 2 days with a 99 percent confidence interval?

• A) 2
• B) 13
• C) 136
• D) 165
• E) 173

---

Definitions:

Internet Scams

Fraudulent activities carried out online with the intent of stealing money or personal information from individuals.

Security Measures

Actions or mechanisms put in place to ensure safety and protect assets, including information technology, from threats and vulnerabilities.

Sharia

The moral code and religious law of Islam, governing both personal conduct and legal matters.

Stoning to Death

An ancient and severe form of capital punishment where a group throws stones at a person until they die. This method is widely condemned as inhumane by international human rights organizations.