Brink studied the effect of postural change on cardiovascular reactivity for a sample of healthy white and African American men and women. Change in systolic blood pressure (SBP) from supine to standing position was used as the measure of cardiac reactivity in a sample of 842 adults. Supine measurement of blood pressure was taken after participants had lain on an examination table for 15 minutes. Blood pressure was measured five times every 2 minutes using a preset automated blood pressure monitor, and the five measurements were averaged. Participants then stood up, and an additional five measurements were made over another 10-minute period and then averaged. Below is a table describing the characteristics of Brink’s sample. Characteristics of the Study Sample (N = 842) Sample Characteristic Frequency (N) Percentage or Mean (SD) Range Gender Female Male 408 434 48.5% 51.5% Age (years) 842 55.1 (5.3) 44–67 Race/ethnicity White, not Hispanic African American 701 141 83.3% 16.7% Smoking status Nonsmoker Currently smokes <1 pack/day Currently smokes 1+ packs/day 698 91 53 82.9% 10.8% 6.3% BMI 831 24.9 (4.1) 18.1–36.3 Which measure(s) of variability, if any, are presented in this table If age were normally distributed, approximately what percentage of the sample would be older than 60 years? If BMI were normally distributed, approximately what percent of the sample would have a BMI higher than 33?
Brink studied the effect of postural change on cardiovascular reactivity for a sample of healthy white and African American men and women. Change in systolic blood pressure (SBP) from supine to standing position was used as the measure of cardiac reactivity in a sample of 842 adults. Supine measurement of blood pressure was taken after participants had lain on an examination table for 15 minutes. Blood pressure was measured five times every 2 minutes using a preset automated blood pressure monitor, and the five measurements were averaged. Participants then stood up, and an additional five measurements were made over another 10-minute period and then averaged.
Below is a table describing the characteristics of Brink’s sample.
Characteristics of the Study Sample (N = 842)
|
Sample Characteristic |
Frequency (N) |
Percentage or Mean (SD) |
|
|
Gender Female Male |
408 434 |
48.5% 51.5% |
|
|
Age (years) |
842 |
55.1 (5.3) |
44–67 |
|
Race/ethnicity White, not Hispanic African American |
701 141 |
83.3% 16.7% |
|
|
Smoking status Nonsmoker Currently smokes <1 pack/day Currently smokes 1+ packs/day |
698 91 53 |
82.9% 10.8% 6.3% |
|
|
BMI |
831 |
24.9 (4.1) |
18.1–36.3 |
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Which measure(s) of variability, if any, are presented in this table
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If age were
normally distributed , approximately what percentage of the sample would be older than 60 years? -
If BMI were normally distributed, approximately what percent of the sample would have a BMI higher than 33?
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