Find the Confidence Interval Specified $\sigma$ = 31 Pounds

question 66

Multiple Choice

Find the confidence interval specified.
-49 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 11.7 pounds. Assume that $\sigma$ = 3.1 pounds. What is the 95% confidence interval for
The true mean weight, µ, of all packages received by the parcel service?

• A)10.6 to 12.8 pounds
• B)11.0 to 12.4 pounds
• C)10.7 to 12.7 pounds
• D)10.8 to 12.6 pounds

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