Test the Claim About the Population Mean $\mu$ At the Level of Significance α

Multiple Choice

Test the claim about the population mean $\mu$ at the level of significance α. Assume the population is normally distributed. Claim: $\mu > 28 ; \alpha = 0.05 ; \sigma = 1.2$
Sample statistics: $\bar { x } = 28.3 , n = 50$

A) Reject $\mathrm { H } _ { 0 }$ . There is enough evidence at the 5% level of significance to support the claim.
B) Fail to reject $\mathrm { H } _ { 0 } \text {. }$ There is not enough evidence at the 5% level of significance to support the claim.
C) Not enough information to decide.