7. Trautwein and Ammerman are curious how the CI group compares to the norm on C

Question

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.

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

Explanation / Answer

Result:

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.

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.

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

µ?: mean of CLS-Post when Group = 2

Difference: ?? - µ?

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