How many standard deviations from the average usage

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Masso Company used 2.0 square meters of material for each wetsuit they produced in April 2005. Data from the past 36 months indicates average actual usage of 1.8 square meters of material per wetsuit with a standard deviation of .20. How many standard deviations apart is 2.0 square metres from the average usage of 1.8 square metres, and should a variance investigation be conducted?

a. 1 and no

b. 1 and yes

c. .2 and no

d. .2 and yes

Reference no: EM131729960

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