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  3. a machine fills bottles with 64 ounces of liquid t

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

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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 a 0 1 The null and alternative hypothesis would be 0 Ho 0 38 Ho p 64 Ho o 0 42 Ho p 0 38 Ho o 64 H 00 38 H 64 H o 0 42 H 0 38 H 0 64 O The test is left tailed two tailed right tailed Based on a sample of 19 bottles The test statistic is The D value is to 2 decimals to 2 decimals

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