Question

The Ball Corporation's beverage can manufacturing plant in Fort Atkinson, Wisconsin, uses a metal supplier that provides metal with a known thickness standard deviation σ = .000965 mm. Assume a random sample of 58 sheets of metal resulted in an x̄=.3193 mm. Calculate the 98 percent confidence interval for the true mean metal thickness. (Round your answers to 4 decimal places.) The 98% confidence interval is from — to—

Answer #1

**0.3193
2.326 ( 0.000965 /
58 )**

**0.3193
0.0003**

**( 0.3190 , 0.3196 )**

**At 98 %, CI for Mean is from 0.3190
to 0.3196**

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