Question

DEHS Data Set for Assessment Projects
INTD 5064 Applied Statistics for Health Care Practitioners
CI Subjects
Subject ID	Group	Gender	Mode of Communication	ESP-Pre	TL-Pre	AC-Pre	EC-Pre		ESP Post	CLS-Post	RLI-Post	ELI-Post	LCI-Post	LSI-Post	GF-Post
C01	1	1	1	1	86	89	95		3	95	96	99	90	88	101
C02	1	2	1	1	82	85	85		3	85	89	87	83	78	89
C03	1	1	1	1	85	78	80		3	90	92	88	88	84	85
C04	1	1	1	2	81	81	82		2	80	88	84	79	76	105
C05	1	2	1	1	92	95	100		4	100	100	95	98	104	82
C06	1	1	1	1	79	80	72		4	92	94	90	92	82	90
C07	1	1	1	1	78	80	74		3	84	88	79	86	80	80
C08	1	2	1	1	111	115	102		3	120	122	112	109	110	102
C09	1	1	1	2	87	89	79		4	88	92	87	87	82	82
C10	1	2	1	2	99	98	89		4	100	98	90	104	106	95
C11	1	1	1	1	67	69	68		3	79	84	82	70	78	77
C12	1	2	2	1	102	100	98		2	95	98	93	96	90	82
C13	1	1	2	1	74	74	70		2	70	72	70	71	68	74
C14	1	2	2	1	68	65	70		1	67	69	66	65	68	70
C15	1	1	2	1	95	90	101		2	90	92	88	85	95	87
C16	1	1	2	1	75	77	76		2	72	75	70	74	68	69
Non CI Subjects
Subject ID	Group	Gender	Mode of Communication	ESP-Pre	TL-Pre	AC-Pre	EC-Pre		ESP Post	CLS-Post	RLI-Post	ELI-Post	LCI-Post	LSI-Post	GF-Post
S01	2	2	2	1	95	89	100		2	93	89	85	100	92	82
S02	2	1	2	1	87	85	95		1	80	83	82	80	78	70
S03	2	2	2	2	76	78	80		1	78	72	70	77	80	65
S04	2	1	2	1	75	73	72		2	73	71	72	75	72	68
S05	2	1	2	1	79	78	80		1	80	70	72	85	81	63
S06	2	1	2	1	77	78	74		1	75	77	68	85	70	71
S07	2	1	2	1	78	80	72		2	72	75	70	72	69	60
S08	2	2	2	1	77	81	75		1	80	89	73	75	78	65
S09	2	1	2	1	87	88	84		1	80	84	80	75	80	68
S10	2	1	2	1	89	98	82		3	90	100	85	85	85	78
S11	2	2	2	1	90	94	92		1	85	90	82	79	87	72
S12	2	1	2	1	73	78	72		1	70	74	67	79	68	66
S13	2	2	2	1	74	74	75		1	70	72	69	67	75	67
S14	2	2	2	1	68	65	68		2	62	60	61	67	60	55
S15	2	1	2	1	75	74	72		1	71	77	67	75	71	70
S16	2	1	2	1	74	77	73		1	77	74	68	80	72	65

7. Trautwein and Ammerman are curious how the CI group compares to the norm on CLS at the end of the study.

a. What inferential test should the researchers use? Why?

b. What are the independent and dependent variables?

           

c. Using the A-B-C-D format used in class, answer Drs. Trautwein and Ammerman’s research question.

Answer 1

7. Trautwein and Ammerman are curious how the CI group compares to the norm on CLS at the end of the study.

a. What inferential test should the researchers use? Why?

Post ClS is a continuous variable and average of two groups are to be compared. Independent sample t test is used to compare mean ALS post scores of the two groups.

b. What are the independent and dependent variables?

       independent variable: CI group( CI and Non CI)

dependent variable:   CLS score

c. Using the A-B-C-D format used in class, answer Drs. Trautwein and Ammerman’s research question

MINITAB used.

.

Df = n1+n2-2

Two-Sample T-Test and CI: CLS-Post, Group

Method

??: mean of CLS-Post when Group = 1

µ?: mean of CLS-Post when Group = 2

Difference: ?? - µ?

Equal variances are assumed for this analysis.

Descriptive Statistics: CLS-Post

Group	N	Mean	StDev	SE Mean
1	16	87.9	13.2	3.3
2	16	77.25	7.87	2.0

Estimation for Difference

Difference	Pooled StDev	95% CI for Difference
10.69	10.88	(2.83, 18.55)

Test

Null hypothesis	H?: ?? - µ? = 0
Alternative hypothesis	H?: ?? - µ? ? 0

T-Value	DF	P-Value
2.78	30	0.009

Calculated t=2.78, P=0.009 which is < 0.05 level of significance.

Null hypothesis is rejected.

We conclude that there is significant mean difference in CLS at the end of the study between the two CI groups.