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A drug manufacturer claimed that the mean potency of one of its antibiotics was 80%. A random sample of 100 capsules were tested and gave

A drug manufacturer claimed that the mean potency of one of its antibiotics was 80%. A random sample of 100 capsules were tested and gave a sample mean of 79.7%, with a SD of .8%.To test if the data present sufficient evidence to refute manufacturers claim, let alpha = .05

State the null hypothesis

a.=80

b. does not =80

c.<80

d.>80

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