### Question:
BivariateDataStatisticsCalculator { public double standardErrorForIntercept() { double value = xMean() * xMean() / secondMomentOf(xData); value += 1. / size(); value *= meanSquaredError(); return Math.sqrt(value); } BivariateDataStatisticsCalculator(DoubleTensor xData, DoubleTensor yData); long size(); double xMean(); double yMean(); double estimatedGradient(); double estimatedIntercept(); double meanSquaredError(); double standardErrorForGradient(); double standardErrorForIntercept();  }### Answer:
@Test public void youCanGetTheStandardErrorForTheIntercept() { assertThat(stats.standardErrorForIntercept(), greaterThan(0.)); }