### Question:
NormalOneSample { public static boolean testSum(double xsum, int n, double H0mean, double std, boolean is_twoTailed, double aLevel) { if(n<=0 || std<=0) { throw new IllegalArgumentException("All the parameters must be positive."); } double z = (xsum-n*H0mean)/(std*Math.sqrt(n)); boolean rejectH0 = checkCriticalValue(z, is_twoTailed, aLevel); return rejectH0; }  static boolean testMean(double xbar, int n, double H0mean, double std, boolean is_twoTailed, double aLevel); static boolean testSum(double xsum, int n, double H0mean, double std, boolean is_twoTailed, double aLevel); static boolean testPercentage(double pbar, int n, double H0p, boolean is_twoTailed, double aLevel);  }### Answer:
@Test public void testTestSum() { logger.info("testSum"); double xsum = 65.3; int n = 100; double H0sum = 0.65; double std = 0.02; boolean is_twoTailed = false; double aLevel = 0.05; boolean expResult = false; boolean result = NormalOneSample.testSum(xsum, n, H0sum, std, is_twoTailed, aLevel); assertEquals(expResult, result); }