Write R code to perform Hypothesis Testing to choose between Null and Alternative Hypothesis and provide justification to your decision with explanation. 

If the average of HourlyRate of all the employees is equal to $65. 2.2 (10 points) If the YearsAtCompany of Single is less than Married. 2.3 (10 points) If the JobSatisfaction of Attrition=Yes is less than Attrition=No. 2.4 (15 points) If the MonthlyIncome of Manager is almost equal to Research Director in such senior positions whose ages are greater than 40.