The Weight of a Product Is Measured in Pounds $\sigma$ ² = 100 Lbs

question 54

Multiple Choice

The weight of a product is measured in pounds.A sample of 50 units is taken from a batch.The sample yielded the following results: = 75 lbs. ,but we know that $\sigma$ ² = 100 lbs.Calculate a 99 percent confidence interval for .

• A)[71.36 78.64]
• B)[74.25 75.75]
• C)[38.58 111.42]
• D)[71.71 78.29]

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