Test the Claim That $\sigma ^ { 2 } < 22.4 \text { if } \mathrm { n } = 28 , \mathrm {~s} ^ { 2 } = 14 \text {, and } \alpha = 0.10$

Test the claim that $\sigma ^ { 2 } < 22.4 \text { if } \mathrm { n } = 28 , \mathrm {~s} ^ { 2 } = 14 \text {, and } \alpha = 0.10$ .10. Assume that the population is normally distributed.