fixed troubles in probability distribution caculations

app/src/main/java/com/elearning/probabilityandstatisticsanalyserandeducator/calculationfunction/DisplayEssayQuestionAnsWithStepsActivity.java

@@ -399,7 +399,7 @@ public class DisplayEssayQuestionAnsWithStepsActivity extends AppCompatActivity
         }
 
         //------------------Probability Distribution------------------------------------------------------------------------
-        if(keywordlist.contains("Standard Deviation")){
+     /*   if(keywordlist.contains("Standard Deviation")){
             bundle.putDouble("std_Value", (Double) stddistributionlist.get(0));
             bundle.putIntArray("Dataset_Values", (int[]) stddistributionlist.get(2));
             bundle.putDoubleArray("Probability_Value", (double[]) stddistributionlist.get(1));
@@ -413,7 +413,7 @@ public class DisplayEssayQuestionAnsWithStepsActivity extends AppCompatActivity
 
 
         }
-/*
+
         if(keywordlist.contains("Mean")){
             bundle.putDouble("Mean_Value", (Double) meanDlist.get(0));
             bundle.putIntArray("Dataset_Values", (int[]) meanDlist.get(2));

app/src/main/java/com/elearning/probabilityandstatisticsanalyserandeducator/calculationfunction/ProDistCalculation.java

@@ -66,8 +66,9 @@ public class ProDistCalculation {
                 System.out.println("Probabilityvalue c:" + probabilityvalue[i]);
 
 
-                meanOfProbabilityDistribution = meanOfProbabilityDistribution + randomVariables[i] * probabilityvalue[i];
-                System.out.println("Mean Of Distribution:" + (meanOfProbabilityDistribution));
+                meanOfProbabilityDistribution+= randomVariables[i] * probabilityvalue[i];
+                double roundedFloat = (double) Math.round(meanOfProbabilityDistribution * 100.0) / 100.0;
+                System.out.println("Mean Of Distribution:" + roundedFloat);
 
                 list.add(0, meanOfProbabilityDistribution);
                 list.add(1, b);
@@ -158,9 +159,10 @@ public class ProDistCalculation {
 
                double res3 = res2 - pow((meanOfProbabilityDistribution),2);
                double finalresult = sqrt(res3);
-        System.out.println("Stdvalueddd:"+finalresult);
+        double roundedFloat = (double) Math.round(finalresult * 10000.0) / 10000.0;
+        System.out.println("Stdvalueddd:"+roundedFloat);
 
-                list.add(0, finalresult);
+                list.add(0, roundedFloat);
                 list.add(1, b);
                 list.add(2, a);
                 list.add(3,meanOfProbabilityDistribution);
@@ -244,9 +246,10 @@ public class ProDistCalculation {
                 double res3 = res2 - pow((meanOfProbabilityDistribution),2);
                 double finalresultstd = sqrt(res3);
                 double finalresultvariance =pow((finalresultstd),2);
-        System.out.println("finalresultvariance"+finalresultvariance);
+        double roundedFloat = (double) Math.round(finalresultvariance * 10000.0) / 10000.0;
+        System.out.println("finalresultvariance"+roundedFloat);
 
-                list.add(0, finalresultvariance);
+                list.add(0, roundedFloat);
                 list.add(1, b);
                 list.add(2, a);
                 list.add(3,meanOfProbabilityDistribution);

app/src/main/java/com/elearning/probabilityandstatisticsanalyserandeducator/calculationfunction/StdCalculation.java

@@ -41,11 +41,12 @@ public class StdCalculation {
         variance= populationstandardDeviation/(a.length);
 
         respopulationstd = sqrt(variance);
+        double roundedFloat = (double) Math.round(respopulationstd * 10000.0) / 10000.0;
 
-        System.out.println("PopulationStandardDeviation:" + respopulationstd);
+        System.out.println("PopulationStandardDeviation:" + roundedFloat);
         list.add(0,a);
         list.add(1,mean);
-        list.add(2,respopulationstd);
+        list.add(2,roundedFloat);
         list.add(3,populationstandardDeviation);
         list.add(4,noofElement);
         return list;
@@ -95,10 +96,11 @@ public class StdCalculation {
          int y = noofElement-1;
         double x= (a.length-1)* (pow(respopulationstd,3));
         res = skewness/x;
+        double roundedFloat = (double) Math.round(res * 10000.0) / 10000.0;
 
-        System.out.println("skewness:" + res);
+        System.out.println("skewness:" + roundedFloat);
         list.add(0,a);
-        list.add(1,res);
+        list.add(1,roundedFloat);
         list.add(2,mean);
         list.add(3,respopulationstd);
         list.add(4,skewness);
@@ -147,10 +149,11 @@ public class StdCalculation {
         double x= (a.length-1)* pow(respopulationstd,4);
         res = kurtosis/x;
         int y=a.length-1;
+        double roundedFloat = (double) Math.round(res * 10000.0) / 10000.0;
 
-        System.out.println("Kurtosis:" + res);
+        System.out.println("Kurtosis:" + roundedFloat);
         list.add(0,a);
-        list.add(1,res);
+        list.add(1,roundedFloat);
         list.add(2,mean);
         list.add(3,kurtosis);
         list.add(4,x);
@@ -192,11 +195,12 @@ public class StdCalculation {
         }
 //variance
         variance = x / (a.length);
-        System.out.println("Variance:" + variance);
+        double roundedFloat = (double) Math.round(variance * 10000.0) / 10000.0;
+        System.out.println("Variance:" + roundedFloat);
 
         list.add(0, a);
         list.add(1, mean);
-        list.add(2, variance);
+        list.add(2, roundedFloat);
         list.add(3,x);
         list.add(4,noofElement);