Updated code for DescriptiveStatisticsQuestionComparation and StandardDeviationQuestionComparation classes

See merge request !60

Updated DescriptiveStatisticsQuestionComparation class and StandardDeviationQuestionComparation class

Fixed the Issue in Standarad deviation - essey problem error

See merge request !59

# Conflicts:
#	app/src/main/java/com/elearning/probabilityandstatisticsanalyserandeducator/inputMethod/DescriptiveSCinputMethod.java

Fixed the null pointer exception when radio button is not selected on standarad deviation

See merge request !58

# Conflicts:
#	app/src/main/java/com/elearning/probabilityandstatisticsanalyserandeducator/inputMethod/DescriptiveSCinputMethod.java
#	app/src/main/java/com/elearning/probabilityandstatisticsanalyserandeducator/inputMethod/StandardDeviationInputMethod.java

Completed initial exams for 6 categories

See merge request !56

Changed the extract dataset regex pattern for essay type questions in descriptive statistics and standard deviation

See merge request !57

Change regex pattern in ExtractDatasetFromDesQuestion method in DescriptiveStatisticsQuestionComparation class

Extract matching keywords from standard deviation essay type questions

See merge request !55

Update in Essay questions - part 3

See merge request !54

Newly updated keywords list in Descriptive statistics Question Comparation class

See merge request !53

Change DashBordHome

See merge request !52

Updated keywords list in DescriptiveStatisticsQuestionComparation class and update sample questions in sample1.csv

 Conflicts:
	app/build.gradle

# Conflicts:
#	app/src/main/java/com/elearning/probabilityandstatisticsanalyserandeducator/inputMethod/DescriptiveSCinputMethod.java

Extract necessary data from essay type descriptive statistics questions

See merge request !49

# Conflicts:
#	app/src/main/AndroidManifest.xml
#	app/src/main/res/layout/activity_userdashboard.xml