Test the Claim That $\sigma = 6.21 \text { if } \mathrm { n } = 12 , \mathrm {~s} = 5.7 \text {, and } \alpha = 0.05 \text {. }$

Essay

Test the claim that $\sigma = 6.21 \text { if } \mathrm { n } = 12 , \mathrm {~s} = 5.7 \text {, and } \alpha = 0.05 \text {. }$ .05. Assume that the population is normally distributed.