Table 1. Fasting Blood
FBS of Group A
FBS of Group B
95
90
100
100
125
125
175
200
250
550
1. What is the mean fasting blood sugar value for each group? What is the median? Mode?
Group A: mean:145, median: 125, mode: no mode for group A
Group B: mean: 213, median: 125, mode: no mode for group B
2. What is the range of fasting blood sugar values for Group A? For Group B?
Group A range: 250-95= 155 is the range
Group B range: 550-90= 460 is the range
3. How stable is the range as a measure of variability? Why?
Not very stable. The range gives the difference between the highest and lowest blood sugars but does not offer any information as to where the other data points lie, giving only a rough idea of how widespread the observations are.
4. What statistical value represents the 50th percentile? The statistical value that represents the 50thpercentile for both groups is 125.
5. The standard deviation (SD) for Group A= 64.75. The SD for Group B= 193.25.
-What do these values say about how the data vary around the mean for each group?
-Vary between groups? (See Standard Deviation text and Table 13-8 for help).
6. If you had each patient's fasting blood sugar value and age, what procedure will you use to make comparisons among unlike data?
7. If the data sets approximated a normal distribution, then what percentage of patients' fasting blood sugar values would fall within two SDs of the mean?
Part 3
Interpret the following correlation values in terms of magnitude (weak, moderate, strong) and direction (positive or negative):
1. Efficient study habits are correlated with good test scores at 0.90.
Magnitude strong Direction positive
2. Age is correlated with pain tolerance at -0.30.
Magnitude weak Direction negative
3. Lack of rest and poor thinking in class are correlated at 0.95.
Magnitude strong Direction positive
4. General health status is correlated with ability to perform self-care measures at 0.74.
Magnitude strong Direction positive
5. Time on the operating table is correlated with development of decubiti in elderly patients at 0.68.
Magnitude strong Direction positive
6. Hours of overtime worked is correlated with grades in a nursing research course at -0.81.
Magnitude strong Direction negative
7. Hours of complete bedrest is correlated with the development of phlebitis at 0.51.
Magnitude moderate Direction positive
8. Alcohol consumption is correlated with bone density of elderly women at -0.92.
Magnitude strong Direction negative
9. Amount of exercise is correlated with lipid levels at -0.81.
Magnitude strong Direction negative
10. Number of courses completed toward a bachelor's degree is correlated with personal satisfaction at 0.84
Magnitude strong Direction positive