Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 29 Nov 2017 My Price 5.00

standard deviation of weights

11.17   In the past, the standard deviation of weights of certain 40.0-ounce  packages  filled  by  a  machine was 0.25 ounce (oz). A random sample of 20 packages showed a standard deviation of 0.32 oz. Is the apparent increase in variability significant at the (a) 0.05 and (b) 0.01 levels?

 

 

 

 

11.18   Two samples of sizes 9 and 12 are drawn from two normally distributed populations having variances 1 6 and 25, respectively. If the sample variances are 20 and 8, determine whether the first sample has a significantly larger variance than the second sample at significance levels of (a) 0.05 and (b) 0.01.

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Maurice Tutor
(5)
Status NEW Posted 29 Nov 2017 10:11 PM My Price 5.00

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