Denny studied factors affecting cardiovascular reactivity to a postural change in a sample of healthy 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 determined every 30 seconds using a Dinamap device for 2 minutes, and the measurements were averaged. Participants then stood up immediately, and additional measurements were made for another 2 minutes. Below is a table describing the characteristics of Denny’s sample: Which variables in the table, if any, were measured on a ratio scale? Which measures of central tendency, if any, are presented in this table? Which measures of dispersion, if any, are presented in this table (Ranges, SDs)? Table 1 Characteristics of the Study Sample (N=842) Sample Characteristic Frequency (n) Percent or Mean (SD) Range Gender Female 408 48.5% 55.1 Male 434 51.1% Age (years) 842 (5.1) 44-67 Age 60 and older 101 16.2% Race/ethnicity White, not Hispanic 701 83.3% African American 141 16.7% Smoking status Nonsmoker 698 82.9% 24.9 Currently smokes <1 pack/day 91 10.8% Currently smokes 1+ packs/day 53 6.3% BMI BMI 831 (4.1) 18.1–36.3 BMI >25 ( overweight) 295 35.5%
Denny studied factors affecting cardiovascular reactivity to a postural change in a sample of healthy 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 determined every 30 seconds using a Dinamap device for 2 minutes, and the measurements were averaged. Participants then stood up immediately, and additional measurements were made for another 2 minutes. Below is a table describing the characteristics of Denny’s sample: Which variables in the table, if any, were measured on a ratio scale? Which measures of central tendency, if any, are presented in this table? Which measures of dispersion, if any, are presented in this table (Ranges, SDs)? Table 1 Characteristics of the Study Sample (N=842) Sample Characteristic Frequency (n) Percent or Mean (SD) Range Gender Female 408 48.5% 55.1 Male 434 51.1% Age (years) 842 (5.1) 44-67 Age 60 and older 101 16.2% Race/ethnicity White, not Hispanic 701 83.3% African American 141 16.7% Smoking status Nonsmoker 698 82.9% 24.9 Currently smokes <1 pack/day 91 10.8% Currently smokes 1+ packs/day 53 6.3% BMI BMI 831 (4.1) 18.1–36.3 BMI >25 ( overweight) 295 35.5%
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 31PPS
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Denny studied factors affecting cardiovascular reactivity to a postural change in a sample of healthy 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 determined every 30 seconds using a Dinamap device for 2 minutes, and the measurements were averaged. Participants then stood up immediately, and additional measurements were made for another 2 minutes. Below is a table describing the characteristics of Denny’s sample:
- Which variables in the table, if any, were measured on a ratio scale?
- Which measures of
central tendency , if any, are presented in this table? - Which measures of dispersion, if any, are presented in this table (Ranges, SDs)?
Table 1 Characteristics of the Study Sample (N=842)
| Sample Characteristic | Frequency (n) | Percent or Mean (SD) | ||
| Gender | Female | 408 | 48.5% | 55.1 |
| Male | 434 | 51.1% | ||
| Age (years) | 842 | (5.1) | 44-67 | |
| Age 60 and older |
101 |
16.2% | ||
|
Race/ethnicity
|
White, not Hispanic |
701 |
83.3% |
|
|
African American |
141 |
16.7% | ||
|
Smoking status
|
Nonsmoker |
698 |
82.9% |
24.9 |
| Currently smokes <1 pack/day |
91 |
10.8% | ||
| Currently smokes 1+ packs/day |
53 |
6.3% | ||
|
BMI
|
BMI |
831 |
(4.1) |
18.1–36.3 |
| BMI >25 ( overweight) |
295 |
35.5% |
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