Question description

 

statistics homework, there are analytical questions , please read before let me know if you can do it, 1.- A RN performed a two groups clinical trial with for A1C patients that were controlling its diabetes with Metformin ( group A) and Metformin with Glyburide (group B), after 3 month taking the tablets, with the following A1C results:

Group A	5.2	5.8	5.4	4.2	4.7	5.7	5.3	5.6	5.4	6.0
Group B	4.8	4.9	5.0	4.4	5.1	5.9	5.8	5.2	5.7	5.6

Normal ranges for hemoglobin A1c in people without diabetes is about 4% to 5.9%. People with diabetes with poor glucose control have hemoglobin A1c levels above 7%

The data was analyzed by SPSS obtaining:

Statistics
Â		A1CGroupA	A1CGropupB
N	Valid	10	10
	Missing	0	0
Mean		5.330	5.240
Std. Error of Mean		.1693	.1558
Median		5.400	5.150
Mode		5.4	4.4a
Std. Deviation		.5355	.4926
Variance		.287	.243
Skewness		-1.103	-.147
Std. Error of Skewness		.687	.687
Kurtosis		1.135	-.996
Std. Error of Kurtosis		1.334	1.334
Range		1.8	1.5
Percentiles	25	5.075	4.875
	50	5.400	5.150
	75	5.725	5.725
a. Multiple modes exist. The smallest value is shown

Â

a.- Explain why a multimode result was reported for group B and from its graph report the values of both modes.

b.- Can we reject that the data of both groups depart from Normality?. Explain your conclusion with the corresponding values.

c.- The following table shows the t test comparing both independent groups:

Independent Samples Test
Â		Levene's Test for Equality of Variances		t-test for Equality of Means
		F	Sig.	t	df	Sig. (2-tailed)	Mean Difference	Std. Error Difference	95% Confidence Interval of the Difference
									Lower	Upper
A1Cbothgroups	Equal variances assumed	.032	.860	.391	18	.700	.09000	.23010	-.39342	.57342
	Equal variances not assumed	Â	Â	.391	17.876	.700	.09000	.23010	-.39366	.57366

c-1- Express the null and the alternative hypothesis for this situation.

c.2.-Report the value of the t test: ____________

c.3.-Can we conclude that the results for both groups are significantly different? ____________

c.4- Conclude about the hypothesis that support your results._____________

c.5.- Discuss the meaning of the 95% confidence interval of the difference:_

c.4.- Mark in both graphs the upper and lower quartile, the median and the 95% confidence interval for each group and if there is an outlier.

Note the t critical, for df=18, sig.=0.05 and two tail test = 2.101

2.- The following glucose results came from 36 females selected from a Hospital.

The average value of the group = 144.8 mg/dL . with a variance (S2 ) = 9.0

Is that value significantly higher than the limit for prediabetes historically expected 140 mg/dL.?

Calcule the Zscore =

b.-Select the proper Zcritical for your comparison: Zcritical = 1.645 (one tail) or Zcritical =2.0 (two tails)

c.- Can you tell that the group should be considered prediabetic and deserves a proper treatment?

3.- The historical proportion of a certain disease in a South American tropical town is 0.9 % (group A) but in a rainy season the RN found 12 cases in a population of 1255 inhabitants (group B). Should the nurse recommend special measures?

Determine the Zscore, and answer yes or no.

Can she support that there is a significant difference between group A and B?

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• 1504116575-20170304025301hesc_360_first__homework__feb_march___2017.docx