Biostatistics and Applied Epidemiology
Please see attachments and follow the rubric.
Requirements: good enogh
NSG 481: Biostatistics and Applied Epidemiology
Computer Lab Assignment #2
Using the data set that I provide in excel, perform the following tests using:
Independent t test. Divide the group up into those who sleep less than or equal to 6.0 hours a night and those who sleep greater than or equal to 6.1 hours a night. What is the difference in how the two groups rate their “lifenow”? Is it statistically significant at α = 0.05? State your answer in APA format: “The results were/were not statistically significant: t (n) = x.xx, a p value, p< 0.05, two tails”, where n is your sample size and x.xx is your t statistic. Note: You will need to transform your hours of sleep variable into a new variable made up of two choices, a 1 or a 2 (1 for less than or equal to 6 hours of sleep and 2 for greater than or equal to 6.1 hours).
Paired t test. Compare the mean score for the variables “lifenow” and “lifeafter” for the sample. Is the difference in the means statistically significant at α = 0.05? State your answer in APA format: “The results were/were not statistically significant: t (df) = x.xx, a p value, p < 0.01, two tails”. Where df = degrees of freedom and t = your t statistic. You can leave all your data in the original columns to perform this test, so it should be relatively easy.
ANOVA. Look at the variable “living.” Is there a statistically significant difference among students living alone, living with roommates, or living with family in terms of BMI? “Living” wil be your Factor, and BMI will be your dependent variable. Look at the table, what is the SS for between treatments and within treatments, the degrees of freedom for between and within treatments, and the mean square. What is the F statistic? State the results as , “There are/are not significant differences among the three groups F (df for within, df for between) = x.xx, a p value, p < 0.05, two tails.” Where df = degrees of freedom for within treatment, degrees of freedom for between and x = the F statistic.
Is there a correlation between BMI and systolic blood pressure? What is it? State your answer in APA format: “A correlation for the data revealed that BMI and systolic blood pressure were/were not significantly related, r = x.xx, n = (sample size), a p value and p < 0.05, two tails.”
Please refer to p. 101-102 (independent t test), p. 135 – 136 (paired t test), p. 164 -166 (ANOVA), and p. 277 (Correlation). The following are the specific directions to run pearson correlation: click on the Analyze menu item at the top of the window, click on Correlate from the drop down menu, and Bivariate from the pop up menu, select the variables you want to correlate and move them to the next box, select pearson and two-tailed, clicks on the options button for means and SD, and finally click on OK to get the SPSS output viewer. As the very first step, make sure to report descriptive statistics, including frequency and mean with a standard deviation depending on the type of the measurement scales.
481 Biostatistics and Epidemiology
Data Collection Project Assignment
The purpose of this project is to create a data set for our use in the computer lab. You are being asked to be part of this project because you are a student in 481 Biostatistics and Epidemiology. This data will be used to achieve an important goal of this course, that of data entry and data analysis using SPSS. No identifying information is being asked, thus responses to this questionnaire are anonymous.
Living situation
Live alone
Live with a room-mate(s)
Live with my family
Place of residence
Walking distance to campus
Not within walking distance to campus
Employment status
Full time employment
Part time employment
Currently not working
Which of the following best describes your health
Excellent
Good
Fair
Poor
Which of the following best describes your level of physical activity
High, I engage in physical activity every day
Good, I engage in physical activity on most days
Fair, I engage in physical activity three or fewer days per week
Poor, I admit I am not physically active
Which of the following best describes your eating/dietary habits
Excellent
Good
Fair
Poor
Which of the following best describes your sleeping habits
Excellent
Good
Fair
Poor
Risk Factors for Cardiovascular Disease/Stroke; please use an X in those boxes that apply.
Quality of life prior to graduate school
Please place an X in the box that best represents your assessment of the quality of your life prior to graduate school with 10 representing the best possible life.
Quality of life currently as a graduate student
Please place an X in the box that best represents your assessment of your current quality of life as a graduate student with 10 representing the best possible life.
Future quality of life. Please place an X in the box that best represents your assessment of your future quality of life with 10 representing the best possible life.
Weight in pounds_________________
Height in inches___________________
Blood pressure: systolic:_________diastolic:_________
Calorie intake for a typical weekday_________________
Calorie intake for a typical weekend day____________
Hours of sleep on a typical day_______________________
Waist in inches______________
Hips in inches_________
Waist/hip ratio________
A Rubric to Evaluate Computer Lab Assignment #2 (15%)
Name of student:
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