Use the Given Degree of Confidence and Sample Data to Construct

question 60

Multiple Choice

Use the given degree of confidence and sample data to construct a confidence interval for the population mean $\mu .$ Assume that the population has a normal distribution.
A laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with s=17.6 milligrams. A confidence interval of $173.8 \mathrm { mg } < \mu < 196.2$ mg is constructed for the true mean cholesterol content of all such eggs. It was assumed that the population has a normal distribution. What confidence level does this interval represent?

• A) 99%
• B) 95%
• C) 98%
• D) 80%

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