AP Stats Significant Tests

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• D

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Given the following information, find the z-value for the sample. (Hint: z = (x-bar - μ)/(σ/√n))
x-bar = 68, μ = 71, σ = 7.5, n = 36

• 2.40

• 3.00

• 2.78

• 6.90

An Air Force vase mess hall has received a shipment of 10,000 gallon size cams of cherries. The supplier claims that the average amount of liquid is 0.25 gallons per can. A government inspector took a random sample of 100 cans and found that the average liquid content to be 0.28 gallons per can with a standard deviation of 0.10. Does this indicate that the supplier's claim is too low? (Use a 5% level of significance)

• Do not reject H₀ (z = 3)

• Reject H₀ (z = 2.56)

• Do not reject H₀ (z = 3)

• Reject H₀ (z = 2.56)