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+//One-tailed Tests Concerning Single Mean
+//(When the variance of the Population is Known and the Population is infinite)
+//Example8.2
+//Page233
+//Test2: Ho:u>=k; H1:u<k
+clear
+clc;
+u = input('Enter the Population Mean');
+Sigma2 = input('Enter the Populaion variance');
+std = sqrt(Sigma2); //standard deviation 
+n = input('Enter the Sample Size');
+X = input('Enter the Sample Mean');
+alpha = input('Enter the significance level');
+Test = input('Enter the Type of test')
+//Calculation of Z statistic 
+Zx = normal_distribution_stat(X,u,std,n)
+disp(Zx,'calculated Normal Z-statistic =')
+Z_alpha = standard_normal_zstat(alpha)
+disp(Z_alpha,'Standard Normal Stastistic=')
+if (Test==1) then
+    if (Zx < Z_alpha) then
+        disp('It falls in the Acceptance Region')
+        disp('Then Null Hypothesis Ho should be Accepted')
+    elseif (Zx > Z_alpha)then
+        disp('It falls in the Rejection Region')
+        disp('Then Null Hypothesis Ho should be Rejected')
+    end
+elseif (Test==2) then
+    if (Zx >- Z_alpha) then
+        disp('It falls in the Acceptance Region')
+        disp('Then Null Hypothesis Ho should be Accepted')
+    elseif (Zx <- Z_alpha) then
+        disp('It falls in the Rejection Region')
+        disp('Then Null Hypothesis Ho should be Rejected')
+    end
+end
+//Result
+//Enter the Population Mean 12
+//Enter the Populaion variance 16
+//Enter the Sample Size 36
+//Enter the Sample Mean 10.5
+//Enter the significance level 0.05
+//Enter the Type of test 2
+// 
+// calculated Normal Z-statistic = - 2.25  
+// 
+// Standard Normal Stastistic=     1.64  
+// // It falls in the Rejection Region   
+// // Then Null Hypothesis Ho should be Rejected