A pharmaceutical company produces caffeine pills that are each supposed to contain of caffeine. a quality control expert took a random sample of pills from a batch and measured the amount of caffeine in each pill in the sample. they want to test if the mean amount is significantly different than . let be the mean amount in each pill in the entire batch and be the mean amount in each pill in the sample. which of the following is an appropriate set of hypotheses for their significance test
a. Null hypothesis: H0: μ = μ0, Alternative hypothesis: H1: μ ≠ μ0
b. Null hypothesis: H0: μ = μ0, Alternative hypothesis: H1: μ > μ0
c. Null hypothesis: H0: μ = μ0, Alternative hypothesis: H1: μ < μ0
d. Null hypothesis: H0: μ ≤ μ0, Alternative hypothesis: H1: μ > μ0