Request to have the machines recalibrated at the 𝛼 = 0.01 level significance?

timer Asked: Apr 27th, 2017

Question description

The amount of liquid in a Happy Life bottle of liquid is normally distributed

with a mean of 12 ounces and a standard deviation of 0.1 ounce. The manager

at the Happy Life bottling plant suspects that his machines need to be

recalibrated because they are losing consistency. He randomly selects 16

bottles of water and find that they have a standard deviation of 0.19. Is this

sufficient evidence to support the manager’s request to have the machines

recalibrated at the 𝛼 = 0.01 level of significance?

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