Question

A clinic manager conducted an 8-week training on new regulations affecting the practice. Each employee took a pre-assessment and a post-assessment to determine their level of knowledge on the content of the training. The data are as follow:

Individual	Pre	Post
1	2.4	3
2	2.5	2.8
3	3	3.5
4	2.9	3.1
5	2.7	3.5
6	2.7	3.3
7	2.8	3.1
8	3.3	3.8
9	3.2	3.4
10	3	3.8
11	2.1	2.7
12	2.2	2.5
13	2.7	3.2
14	2.6	2.8
15	2.4	3.2

A) Conduct the appropriate t-test and indicate your evidence at α = 0.05 that the training was effective.

B) Write a one-sentence journal entry for the results.

C) Is this a two-tailed or one-tailed test? Explain your choice.

Answer 1

A)

Here we need to use paired t test. Following table shows the calculations:

Pre	Post	d=Pre-post	(d-mean)^2
2.4	3	-0.6	0.0144
2.5	2.8	-0.3	0.0324
3	3.5	-0.5	0.0004
2.9	3.1	-0.2	0.0784
2.7	3.5	-0.8	0.1024
2.7	3.3	-0.6	0.0144
2.8	3.1	-0.3	0.0324
3.3	3.8	-0.5	0.0004
3.2	3.4	-0.2	0.0784
3	3.8	-0.8	0.1024
2.1	2.7	-0.6	0.0144
2.2	2.5	-0.3	0.0324
2.7	3.2	-0.5	0.0004
2.6	2.8	-0.2	0.0784
2.4	3.2	-0.8	0.1024
Total		-7.2	0.684

b)

We can conclude that training program is effective

c)

Test is one tailed (left tailed).