react-alpha-beta/lib/zTable.js

Simple declarative A/B testing component for React.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.zScoreByConfidenceInterval = zScoreByConfidenceInterval;
var zTable = [
// [area left of z, z]
[0.9997, 3.49], [0.9996, 3.39], [0.9995, 3.33], [0.9994, 3.27], [0.9993, 3.22], [0.9992, 3.18], [0.9991, 3.14], [0.9990, 3.11], [0.9989, 3.08], [0.9988, 3.05], [0.9987, 3.03], [0.9986, 3.00], [0.9985, 2.98], [0.9984, 2.96], [0.9983, 2.94], [0.9982, 2.93], [0.9981, 2.91], [0.9980, 2.89], [0.9979, 2.88], [0.9978, 2.86], [0.9977, 2.85], [0.9976, 2.83], [0.9975, 2.82], [0.9974, 2.81], [0.9973, 2.79], [0.9972, 2.78], [0.9971, 2.77], [0.9970, 2.76], [0.9969, 2.75], [0.9968, 2.74], [0.9967, 2.73], [0.9966, 2.72], [0.9965, 2.71], [0.9964, 2.70], [0.9963, 2.69], [0.9962, 2.68], [0.9961, 2.67], [0.9960, 2.66], [0.9959, 2.65], [0.9957, 2.64], [0.9956, 2.63], [0.9955, 2.62], [0.9953, 2.61], [0.9952, 2.60], [0.9951, 2.59], [0.9949, 2.58], [0.9948, 2.57], [0.9946, 2.56], [0.9945, 2.55], [0.9943, 2.54], [0.9941, 2.53], [0.9940, 2.52], [0.9938, 2.51], [0.9936, 2.50], [0.9934, 2.49], [0.9932, 2.48], [0.9931, 2.47], [0.9929, 2.46], [0.9927, 2.45], [0.9925, 2.44], [0.9922, 2.43], [0.9920, 2.42], [0.9918, 2.41], [0.9916, 2.40], [0.9913, 2.39], [0.9911, 2.38], [0.9909, 2.37], [0.9906, 2.36], [0.9904, 2.35], [0.9901, 2.34], [0.9898, 2.33], [0.9896, 2.32], [0.9893, 2.31], [0.9890, 2.30], [0.9887, 2.29], [0.9884, 2.28], [0.9881, 2.27], [0.9878, 2.26], [0.9875, 2.25], [0.9871, 2.24], [0.9868, 2.23], [0.9864, 2.22], [0.9861, 2.21], [0.9857, 2.20], [0.9854, 2.19], [0.9850, 2.18], [0.9846, 2.17], [0.9842, 2.16], [0.9838, 2.15], [0.9834, 2.14], [0.9830, 2.13], [0.9826, 2.12], [0.9821, 2.11], [0.9817, 2.10], [0.9812, 2.09], [0.9808, 2.08], [0.9803, 2.07], [0.9798, 2.06], [0.9793, 2.05], [0.9788, 2.04], [0.9783, 2.03], [0.9778, 2.02], [0.9772, 2.01], [0.9767, 2.00], [0.9761, 1.99], [0.9756, 1.98], [0.9750, 1.97], [0.9744, 1.96], [0.9738, 1.95], [0.9732, 1.94], [0.9726, 1.93], [0.9719, 1.92], [0.9713, 1.91], [0.9706, 1.90], [0.9699, 1.89], [0.9693, 1.88], [0.9686, 1.87], [0.9678, 1.86], [0.9671, 1.85], [0.9664, 1.84], [0.9656, 1.83], [0.9649, 1.82], [0.9641, 1.81], [0.9633, 1.80], [0.9625, 1.79], [0.9616, 1.78], [0.9608, 1.77], [0.9599, 1.76], [0.9591, 1.75], [0.9582, 1.74], [0.9573, 1.73], [0.9564, 1.72], [0.9554, 1.71], [0.9545, 1.70], [0.9535, 1.69], [0.9525, 1.68], [0.9515, 1.67], [0.9505, 1.66], [0.9495, 1.65], [0.9484, 1.64], [0.9474, 1.63], [0.9463, 1.62], [0.9452, 1.61], [0.9441, 1.60], [0.9429, 1.59], [0.9418, 1.58], [0.9406, 1.57], [0.9394, 1.56], [0.9382, 1.55], [0.9370, 1.54], [0.9357, 1.53], [0.9345, 1.52], [0.9332, 1.51], [0.9319, 1.50], [0.9306, 1.49], [0.9292, 1.48], [0.9279, 1.47], [0.9265, 1.46], [0.9251, 1.45], [0.9236, 1.44], [0.9222, 1.43], [0.9207, 1.42], [0.9192, 1.41], [0.9177, 1.40], [0.9162, 1.39], [0.9147, 1.38], [0.9131, 1.37], [0.9115, 1.36], [0.9099, 1.35], [0.9082, 1.34], [0.9066, 1.33], [0.9049, 1.32], [0.9032, 1.31], [0.9015, 1.30], [0.8997, 1.29], [0.8980, 1.28], [0.8962, 1.27], [0.8944, 1.26], [0.8925, 1.25], [0.8907, 1.24], [0.8888, 1.23], [0.8869, 1.22], [0.8849, 1.21], [0.8830, 1.20], [0.8810, 1.19], [0.8790, 1.18], [0.8770, 1.17], [0.8749, 1.16], [0.8729, 1.15], [0.8708, 1.14], [0.8686, 1.13], [0.8665, 1.12], [0.8643, 1.11], [0.8621, 1.10], [0.8599, 1.09], [0.8577, 1.08], [0.8554, 1.07], [0.8531, 1.06], [0.8508, 1.05], [0.8485, 1.04], [0.8461, 1.03], [0.8438, 1.02], [0.8413, 1.01], [0.8389, 1.00], [0.8365, 0.99], [0.8340, 0.98], [0.8315, 0.97], [0.8289, 0.96], [0.8264, 0.95], [0.8238, 0.94], [0.8212, 0.93], [0.8186, 0.92], [0.8159, 0.91], [0.8133, 0.90], [0.8106, 0.89], [0.8078, 0.88], [0.8051, 0.87], [0.8023, 0.86], [0.7995, 0.85], [0.7967, 0.84], [0.7939, 0.83], [0.7910, 0.82], [0.7881, 0.81], [0.7852, 0.80], [0.7823, 0.79], [0.7794, 0.78], [0.7764, 0.77], [0.7734, 0.76], [0.7704, 0.75], [0.7673, 0.74], [0.7642, 0.73], [0.7611, 0.72], [0.7580, 0.71], [0.7549, 0.70], [0.7517, 0.69], [0.7486, 0.68], [0.7454, 0.67], [0.7422, 0.66], [0.7389, 0.65], [0.7357, 0.64], [0.7324, 0.63], [0.7291, 0.62], [0.7257, 0.61], [0.7224, 0.60], [0.7190, 0.59], [0.7157, 0.58], [0.7123, 0.57], [0.7088, 0.56], [0.7054, 0.55], [0.7019, 0.54], [0.6985, 0.53], [0.6950, 0.52], [0.6915, 0.51], [0.6879, 0.50], [0.6844, 0.49], [0.6808, 0.48], [0.6772, 0.47], [0.6736, 0.46], [0.6700, 0.45], [0.6664, 0.44], [0.6628, 0.43], [0.6591, 0.42], [0.6554, 0.41], [0.6517, 0.40], [0.6480, 0.39], [0.6443, 0.38], [0.6406, 0.37], [0.6368, 0.36], [0.6331, 0.35], [0.6293, 0.34], [0.6255, 0.33], [0.6217, 0.32], [0.6179, 0.31], [0.6141, 0.30], [0.6103, 0.29], [0.6064, 0.28], [0.6026, 0.27], [0.5987, 0.26], [0.5948, 0.25], [0.5910, 0.24], [0.5871, 0.23], [0.5832, 0.22], [0.5793, 0.21], [0.5753, 0.20], [0.5714, 0.19], [0.5675, 0.18], [0.5636, 0.17], [0.5596, 0.16], [0.5557, 0.15], [0.5517, 0.14], [0.5478, 0.13], [0.5438, 0.12], [0.5398, 0.11], [0.5359, 0.10], [0.5319, 0.09], [0.5279, 0.08], [0.5239, 0.07], [0.5199, 0.06], [0.5160, 0.05], [0.5120, 0.04], [0.5080, 0.03], [0.5040, 0.02], [0.5000, 0.01]];

/**
 * Function to return a Z-score for a given confidence interval.
 */
function zScoreByConfidenceInterval(confidenceInterval) {
  var twoTailed = arguments.length <= 1 || arguments[1] === undefined ? true : arguments[1];

  var zScore = 0.00;
  var tailedConfidenceInterval = twoTailed ? 1 - (1 - confidenceInterval) / 2 : confidenceInterval;

  if (tailedConfidenceInterval < 0.5000 || tailedConfidenceInterval > 0.9998) {
    if (twoTailed) {
      throw new Error('Your confidenceInterval must be between 0.5000 and 0.9996');
    } else {
      throw new Error('Your confidenceInterval must be between 0.5000 and 0.9998');
    }
  }

  for (var i = 0; i < zTable.length; i++) {
    if (tailedConfidenceInterval > zTable[i][0]) {
      zScore = zTable[i][1];
      break;
    }
  }

  return zScore;
}