정규 분포

@frozen
public struct NormalDistribution<T: BinaryFloatingPoint>: RandomDistribution
where T.RawSignificand: FixedWidthInteger

• 평균
  선언

  public let mean: T

• 표준편차
  선언

  public let standardDeviation: T

• 초기화(평균:표준편차:)
  선언

  public init(mean: T = 0, standardDeviation: T = 1)

• 다음(사용:)
  선언

  public func next<G>(using rng: inout G) -> T where G : RandomNumberGenerator