Question

8 of 8 Which of the following independent variable is/are not statistically significant? Select all that apply. Age in years at screening Weight (kg) Gender Triglyceride (mg/dL) Direct HDL-cholesterol (mg/dL) Fasting Glucose (mg/dL) Systolic Blood Pressure (1st reading) 20 We wish to add to the model the patients marital status (married, divorced, separated, widowed, single). Describe how we can include this in the model If we want to see whether the effects of Age in years at screening on Total Cholesterol (mg/dL) differed for males (Gender - 1) and females (Gender - 0). what do we need to do to test this effect?

Answer 1

Assuming alpha = 0.05

if p-value < alpha, we reject the null hypothesis
if p-value > alpha, we fail to reject the null hypothesis

here only Age is significant as its p-value is 0.001 < 0.05 (look at column Sig}
rest all variables are not statistically significant

answer
select all options except Age

20)
we can include n-1 dummy variables for categorical variable with n levels

here n = 5
hence we can add 5-1 = 4 dummy variables

any one level can be base, say single

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