please explain

WOW: :m' the computer-game md of Wardsft, some of the strikes are critical strikes, which do more damage. Assume thatthe probabity of a critical strike is the same for every attack; and that attacks are independent. During a particular ght. a character has 243 critical strikes out of 594 attacks. (a) Construct a 99.9% condence interval for the proportion df strikes that are critical strikes. Round'the answer to at least three decimal places. A 99.9% condence interval for the proportion of strikes that are critical strikes [3