Operations management Quesion

Specifications for a part for a DVD player state that the part should weigh between 25.5 and 26.5 ounces. The process that produces the parts has a mean of 26.0 ounces and a standard deviation of .22 ounce. The distribution of output is normal. Use Table-A.

   

a.

What percentage of parts will not meet the weight specs? (Round your “z” value and final answer to 2 decimal places. Omit the “%” sign in your response.)

    

  Percentage of parts [removed] %  

    

b.

Within what values will 99.74 percent of sample means of this process fall, if samples of n = 12 are taken and the process is in control (random)? (Round your answers to 2 decimal places.)

    
  Lower value [removed] ,  Upper value [removed] 

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