### Question:
CensoredDescriptives { public static double meanStd(AssociativeArray2D survivalFunction) { return Math.sqrt(meanVariance(survivalFunction)); }  static AssociativeArray2D survivalFunction(FlatDataCollection flatDataCollection); static double median(AssociativeArray2D survivalFunction); static double mean(AssociativeArray2D survivalFunction); static double meanVariance(AssociativeArray2D survivalFunction); static double meanStd(AssociativeArray2D survivalFunction); static final String CENSORED_NUMBER_POSTFIX; }### Answer:
@Test public void testMeanStd() { logger.info("meanStd"); AssociativeArray2D survivalFunction = CensoredDescriptives.survivalFunction(generateFlatDataCollection()); double expResult = 1.6695542375259; double result = CensoredDescriptives.meanStd(survivalFunction); assertEquals(expResult, result, Constants.DOUBLE_ACCURACY_HIGH); }