Unit 3: Assignment 5

Total grade = 20

1 In Framingham Heart Study, we want to assess risk factors for Impaired Glucose. The outcome is Glucose and is grouped into 4 categories (Diabetes (glucose > 126), Impaired Fasting, Glucose (glucose 100-125), and Normal Glucose). The associated Risk Factors are Sex (male, female), Age (years), and BMI (normal weight, overweight, obese)

1.1 What kind of variable is Glucose? [2]

1. Binary
2. Nominal
3. Ordinal
4. Continuous
   1. What statistical test would be used to assess whether age is associated with Glucose Category? [2]

1. ANOVA
2. Chi-Square GOF
3. Chi-Square test of independence
4. Test for equality of means
5. Other

2. Consider a Tertiary Outcome Diabetes Status (Diabetes / No Diabetes). The associated Risk Factors are Sex (male, female), Age (years), and BMI (normal weight, overweight, obese). What test would be used to assess whether AGE is associated with Diabetes? [2]

2.1

1. ANOVA
2. Chi-Square GOF
3. Chi-Square test of independence
4. Test for equality of means
5. Other
   1. What test would be used to assess whether BMI is associated with Diabetes?[2]

1. ANOVA
2. Chi-Square GOF
3. Chi-Square test of independence
4. Test for equality of means
5. Other
   • Total Sum of Squares

Question 3 [12]

Suppose you are testing scores for 12 individuals in 3 groups, the scores are as follows

Group 1 : 2, 6, 5, 7

Group 2: 4, 5, 3, 2

Group 3: 2, 3, 4, 4

Calculate

• With-in Group Sum of Squares
• Between Group Sum of Squares
• Fill in the ANOVA table

Unit 3: Assignment 7 Total marks = 25 Answer the questions below [25] What are nonparametric methods? [2] When are they used? [2] What is the rationale of using nonparametric methods? [5] What is the difference between parametric and nonparametric methods? [5] Identify nonparametric tests which are commonly used [5] How do you analyse data using nonparametric methods? [6]