Q2. In the following table, we have a group of 20 students selected from 22,000 students at WCU. Each of the 20 is represented by a unique ID and their corresponding scores on the Stats course scores. We hypothesize that the mean Stats grade of the 20 students is higher than the average grade of the students at WCU (which equals 73 %). Results are showed in the table below:

1. What are the null and alternative hypotheses? (2 pts)
2. What test do we apply here to test if your hypothesis is true? (1 pt)
3. What is the critical value for this example (1 pt)?
4. Compute the test statistic (1 pt).
5. Make the right conclusion regarding whether or not mean of your sample is different from that of WCU (1 pt)

ID	Final Stats Scores (%)
001	78
002	95
003	63
004	91
005	88
006	79
007	48
008	72
009	81
010	75
011	54
012	77
013	99
014	84
015	75
016	48
017	97
018	66
019	73
020	59