According to data, a particular brand of cigarettes contain an average of1.8milligrams of nicotine. An advocacy group commissions an independent test to see if the mean nicotine content is higher than the industry laboratory claims.(a) What areH₀andH_a?

H₀: μ = 1.8 mg;   H_a: μ > 1.8 mg H₀: μ = 1.8 mg;   H_a: μ ≠ 1.8 mg H₀: μ = 0.0 mg;   H_a: μ > 0.0 mg H₀: μ < 0.0 mg;   H_a: μ = 0.0 mg H₀: μ > 1.8 mg;   H_a: μ = 1.8 mg

(b) Suppose that the test statistic isz=2.36. Is this result significant at the 5% level?

No, because z < 1.645 and P > 0.05.No, because z > 1.645 and P > 0.05.Yes, because z > 1.645 and P < 0.05.Yes, because z < 1.645 and P < 0.05.Yes, because z > 1.645 and P > 0.05.

(c) Is the result significant at the 1% level?

No, because z < 2.326 and P > 0.01.No, because z > 2.326 and P > 0.01.Yes, because z > 2.326 and P < 0.01.Yes, because z < 2.326 and P < 0.01.No, because z > 2.326 and P > 0.01.