Fifty rounds of a new type of ammunition were red from a test weapon, and the muzzle

Fifty rounds of a new type of ammunition were fired from a test weapon, and the muzzle velocity of the projectile was measured. The sample had a mean muzzle velocity of 863 meters per second and a standard deviation of 2.7 meters per second.Construct and interpret a 99% confidence interval for the mean muzzle velocity.