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

Essay

Test the claim about the population mean $\mu$ at the level of significance α $\alpha$ Assume the population is normally
distributed. $\text { Claim } \mu \leq 6.4 ; \alpha = 0.05 \text {. Sample statistics: } \bar { x } = 6.7 , \mathrm {~s} = 0.8 , \mathrm { n } = 15$