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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Definitions:

Economic Conditions

The state of the economy at a given time, which includes factors like inflation, unemployment rates, and GDP growth.

Severe Recession

An intense period of economic decline characterized by significant reductions in GDP, high unemployment, and contracting business activities.

Economic Condition

The state of an economy at a given time, including factors such as growth rate, inflation, employment levels, and overall economic health.

Unemployment Rate

The percentage of the labor force that is jobless and actively seeking employment.