Question

In: Statistics and Probability

4. Trautwein and Ammerman hypothesize that mode of communication is related to speech perception after the...

4. Trautwein and Ammerman hypothesize that mode of communication is related to speech perception after the study.

a. What inferential test would they use to complete the analysis? Why? b.

Complete parts B and D of the analysis, using an obtained value of 8.1. You may round speech perception scores.

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

Expert Solution

To test weather the mode of communication is related to speech perception after the study, correlation hypothesis test is performed for the variables mode of communication and ESP-Post. The hypothesis test is performed in following steps,

Step 1: The hypothesis for the test is defined as,

Step 2: The significance level for the test, is the maximum acceptance level at 5% risk which means null hypothesis will be rejected beyond this level ( such that if P-value is less than 0.05 null hypothesis will be rejected)

Step 3: The correlation coefficient is obtained in excel by following these steps,

1) Write the data valued for two variables Mode of Communication and ESP-Post for both CI and Non-CI group. The screenshot is shown below,

2) The Pearson's correlation coefficient value is obtained using the function =CORREL(). The screenshot is shown below,

The correlation coefficient value id obtained.

Step 4: The decision for the statistical significance correlation is determine by the critical correlation coefficient value. Such that if

The critical value for correlation coefficient is obtained using the critical value table,

hence there is a statistically significant relation between mode of communication and speech perception after the study.

orchestra answered 2 years ago

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