Question

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...

.

Please report the test statistics.

.

What is the degree of freedom of the test statistics?

.

What is the p-value?

.

Please state the true/false of the following statement.

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

Select one:

a, True

b, False

Answer 1

using minitab>stat>basic stat>paired sample test

we have

Paired T-Test and CI: score for experimental, control group

Paired T for score for experimental - control group

N Mean StDev SE Mean
score for experimental 10 15.300 2.751 0.870
control group 10 14.200 2.658 0.841
Difference 10 1.100 2.331 0.737

95% CI for mean difference: (-0.567, 2.767)
T-Test of mean difference = 0 (vs ≠ 0): T-Value = 1.49 P-Value = 0.170

the test statistics = 1.49

.

the degree of freedom of the test statistic = 10-1 = 9

.

the p-value is 0.170

.

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

b, False