Mathematics, 30.06.2021 14:00, raizagisselle1273

A machine fills bottles with 64 ounces of liquid. The quality-control manager determines that the fill levels are normally distributed with a mean of 64 ounces and a standard deviation of 0.42 ounce. He has an engineering recalibration machine in attempt to lower the standard deviation. After recalibration, the quality-control manager randomly selects 19 bottles from the line and determines that the standard deviation is 0.38 ounce. Is there less variability in the filling machine? Use α = 0.1 .

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A machine fills bottles with 64 ounces of liquid. The quality-control manager determines that the fi...