// Z values for approximating confidence intervals.
double zvals[99] = {
    0.01253347,
    0.02506891,
    0.03760829,
    0.05015358,
    0.06270678,
    0.07526986,
    0.08784484,
    0.10043372,
    0.11303854,
    0.12566135,
    0.13830421,
    0.15096922,
    0.16365849,
    0.17637416,
    0.18911843,
    0.20189348,
    0.21470157,
    0.22754498,
    0.24042603,
    0.2533471,
    0.26631061,
    0.27931903,
    0.2923749,
    0.30548079,
    0.31863936,
    0.33185335,
    0.34512553,
    0.35845879,
    0.37185609,
    0.38532047,
    0.39885507,
    0.41246313,
    0.42614801,
    0.43991317,
    0.45376219,
    0.4676988,
    0.48172685,
    0.49585035,
    0.51007346,
    0.52440051,
    0.53883603,
    0.55338472,
    0.5680515,
    0.58284151,
    0.59776013,
    0.61281299,
    0.62800601,
    0.64334541,
    0.65883769,
    0.67448975,
    0.69030882,
    0.70630256,
    0.72247905,
    0.73884685,
    0.75541503,
    0.77219321,
    0.78919165,
    0.80642125,
    0.82389363,
    0.84162123,
    0.85961736,
    0.8778963,
    0.89647336,
    0.91536509,
    0.93458929,
    0.95416525,
    0.97411388,
    0.99445788,
    1.01522203,
    1.03643339,
    1.05812162,
    1.08031934,
    1.10306256,
    1.12639113,
    1.15034938,
    1.17498679,
    1.20035886,
    1.22652812,
    1.25356544,
    1.28155157,
    1.31057911,
    1.34075503,
    1.37220381,
    1.40507156,
    1.43953147,
    1.47579103,
    1.51410189,
    1.55477359,
    1.59819314,
    1.64485363,
    1.69539771,
    1.75068607,
    1.81191067,
    1.88079361,
    1.95996398,
    2.05374891,
    2.17009038,
    2.32634787,
    2.5758293,
};
