Find the mean, mod, median, and standard deviation of thefollowing data. And Based on these results, check whether the valueof 10 is usual? 5, 6, 7, 8, 9,8,7,8_________________________________________________________________________Pre-Employment Drug Screening Results are shown in the followingTable: Positive Test Result Negative Test Result Subject Uses Drugs8 (True Positive) 2 (False Negative) Subject is not a Drug User 10(False Positive) 180 (True Negative) If 1 of the 200 test subjectsis randomly selected, find the probability that the subject had apositive test result, given that the subject actually uses drugs.That is, find (positive test result subject uses drugs). If 1 ofthe 200 test subjects is randomly selected, find the probabilitythat the subject actually uses drugs, given that he or she had apositive test result. That is, find ( subject uses drugs positivetest result )._______________________________________________________________________This is observation from previous years about the impact ofstudents working while they are enrolled in classes, due tostudents too much work, they are spending less time on theirclasses. First, the observer need to find out, on average, how manyhours a week students are working. They know from previous studiesthat the standard deviation of this variable is about 5 hours. Asurvey of 200 students provides a sample mean of 7.10 hours worked.What is a 95% confidence interval based on this sample?