i. A psychologist developed a training program for self-efficacy and he tested two independent groups of subjects for their change in self-efficacy with and without the training program. The results were shown below:

	Score for experimental group (with training)		Score for control group
Subject 1	11	Subject 11	10
Subject 3	18	Subject 20	12
Subject 4	19	Subject 7	16
Subject 6	15	Subject 17	14
Subject 9	14	Subject 10	13
Subject 12	16	Subject 2	15
Subject 13	14	Subject 14	13
Subject 16	12	Subject 15	12
Subject 18	15	Subject 8	14
Subject 19	19	Subject 5	20

Q1. What is the mean score of the control group? Q2. What is the standard deviation of the control group?

Q3. What is the mean score of the experimental group?

Q4. What is the standard deviation of the experimental group?

Q5. Please report the statistical test results with test statistics.

Q6. What is the degree of freedom of test statistics?

Q7. What is the p-value?

Q8. Please state the true/false of the following statement: Select one: (True/False)

There is no significant difference between the score of the control group and the experimental group. ii. If the above data set was matched into pairs, please analyse the data again to give a new conclusion.

	Score for experimental group (with training)		Score for control group
Subject 1	11	Subject 11	10
Subject 3	18	Subject 20	12
Subject 4	19	Subject 7	16
Subject 6	15	Subject 17	14
Subject 9	14	Subject 10	13
Subject 12	16	Subject 2	15
Subject 13	14	Subject 14	13
Subject 16	12	Subject 15	12
Subject 18	15	Subject 8	14
Subject 19	19	Subject 5	20

Subject 1 is paired with subject 11;

Subject 3 is paired with subject 20;

Subject 4 is paired with subject 7;

Subject 6 is paired with subject 17....and so on...

Q1. Please report the test statistics. Q2. What is the degree of freedom of the test statistics?

What is the p-value?

Please state the true/false of the following statement. Select one: (True/False)

The score of the control group is significantly higher than that of the experimental group.