PART III: Hypothesis Testing (Continuous Data)

Compare the means for age by males and females (gender) using an appropriate hypothesis test (t-test).

Compare the means for SBP by males and females (gender) using an appropriate hypothesis test (t-test).

Below you will find some questions. Complete the answer box in the right hand column:

Questions Measure of differences between means 1. What is the mean age for males? 2. What is the mean age for females? 3. What is the mean difference in age between males and females? Hypothesis test of differences between means 4. Note the significance value for the Levene Test for Equality of Variances. 5. Can we assume Equal Variances? 6. Write the appropriate t-value and significance value in the answer box.

Answers

Write your conclusion

Variable Name	Description	Coding
RANDOM ID	Random, unique number for each participant
AGE	Age at exam, in years	32-70
GENDER	Participants' sex	1=male, 0=female
TOTAL CHOL	Total cholesterol, mg/dL	107-696
SBP	Systolic blood pressure, mmHg	83.5-295
DBP	Diastolic blood pressure, mmHg	48-142.5
BP MEDS	Anti-hypertensive medications	0=no, 1=yes
BMI	Body mass index, kg/meters2	15.54-56.8
SMOKING	Smoking StatusCardio	0=no, 1=yes
CIGS PER DAY	Number of cigarettes smoked per day	0-70
GLUCOSE	Serum glucose mg/dL	40-394
DIABETES	Diabetic	0=no, 1=yes
HEART RATE	Heart rate , beats/minute	44-143
DEATH	Death from any cause over 24 year follow-up	0=no, 1=yes
STROKE	Stroke over 24 year follow-up	0=no, 1=yes
CVD	Cardiovascular disease over 24 year follow-up	0=no, 1=yes
HYPERTENSION	Hypertension over 24 year follow-up	0=no, 1=yes

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