A manufacturer of safety helmets for construction workers is concerned about the mean and variation of the forces transm

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A manufacturer of safety helmets for construction workers is concerned about the mean and variation of the forces transmitted by helmets to users when they are subjected to a standard external force. The manufacturer wants the average force transmitted by helmets is 800 pounds (or less), well below the legal limit of 1000 pounds and that σ2 is less to 1600. A random sample of n = 40 helmets was taken and it was found that the mean and variance
The samples were equal to 825 pounds and 2350 pounds^2, respectively. Does the data give enough
evidence to indicate that the variance exceeds 1600 pounds^2 ?. Use α = 0.01