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The weights of all the boxes of corn flakes filled by a machine are normally distributed, with a mean weight of14.0ounces and a standard deviation

The weights of all the boxes of corn flakes filled by a machine are normally distributed, with a mean weight of14.0ounces and a standard deviation of 0.4 ounce.

Find thez-scores for boxes which weigh13ounces and15ounces. (Round your answers to two decimal places.)

13ounces:z=

15ounces:z=

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