# statistics homework, there are analytical questions , please

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 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 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 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 .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?