Mean Significance Statistical Test

3. In two wards for elderly women in a nursing home the following levels of hemoglobin were found:

Ward A: 12.2, 11.1, 14.0, 11.3, 10.8, 12.5, 12.2, 11.9, 13.6, 12.7, 13.4, 13.7 grams/dl

Ward B: 11.9, 10.7, 12.3, 13.9, 11.1, 11.2, 13.3, 11.4, 12.0, 11.1 g/dl

Ward A Ward B
n = 12 n = 10
mean = 12.45 mean = 11.89
SD = 1.07 SD=1.03

(a) What is the difference between the mean hemoglobin level in the two wards, and what is the significance, if any, of the difference? State which test you used to determine the answer to this question, along with your hypotheses, and then input the data into SPSS to conduct the statistical test. You can create one variable for “hemoglobin” and one for “ward” to do this in SPSS (Hint: you will have to define the ‘grouping variable’ for the analysis so be sure to give your “ward” variable a numeric value; you cannot use “A” and “B”). Paste your SPSS output below. Be sure to explain the results.


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