Fundamentals of Biostatistics
8th Edition
ISBN: 9781305268920
Author: Bernard Rosner
Publisher: Cengage Learning
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Anemia (low healthy blood cells or hemoglobin) has an important role in exercise performance.
However, the direct link between rapid changes of hemoglobin and exercise performance is
still unknown. A study investigated 18 patients with a blood disorder (beta-thalassemia).
Participants in the study performed an exercise test before and the day after receiving a blood
transfusion. Data are given in the table.
HB = Hemoglobin
RER = Respiratory exchange
ID
Change in
HB
Obese
RER > 1.1
ratio
No
No
1
-1.4
No
-1.5
No
Yes
No
Yes
3
-2
No
4
-2.1
No
-1.9
Yes
Yes
No
-1.6
-1.8
-0.8
6
7
No
Yes
No
Yes
8
9.
-1
No
No
-1.2
No
Yes
10
11
No
No
-0.8
-1.5
12
Yes
No
No
Yes
13
14
-1.4
-2.6
-1.7
No
No
Yes
Yes
15
Yes
No
Yes
Yes
16
-2.6
No
17
18
-2.7
-1.5
No
Could it be that smoking actually increases survival rates among women? The accompanying data represent the 20-year survival status and smoking status of
1334 women who participated in a 20-year cohort study. Complete parts (a) through (e).
Given the data attached in the image for 50 subjects who were treated with a new drug, BP = Blood Pressure, BP-Before -Exp = Blood pressure before the experiment, BP-After-Exp = Blood pressure after the experiment, Two levels of treatment: 0 = Placebo and 1 = treatment group. Family History Blood Pressure = Fam-Hist-BP, Paternal side = Paternal Side, Maternal Side = MS, Both Sides = BS, None on Both Sides or not known = N.
Task: Using the attached data in images, generate a frequency table for each of the following categorical variables - Family Blood Pressure, Blood Pressure Before the treatment, and Blood Pressure After the treatment.
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- What is an experiment?arrow_forwardA key hospital outcome measure of clinical performance is length of stay (LOS), that is, the number of days a patient is hospitalized. For patients at one hospital with acute myocardial infarction (heart attack), the length of stay over the past four years has consistently decreased. The hospital also has data for various treatment options such as the percentage of patients who received aspirin upon arrival and cardiac medication for Left Ventricular Systolic Dysfunction (LVSD). The data are as follows: Year Average LOS Aspirin on arrival LVSD medication 2007 4.31 days 94% 89% 2008 4.10 days 96% 94% 2009 4.35 days 98% 97% 2010 4.13 days 100% 98% Calculate descriptive statistics for the data. Do not round intermediate calculations. Round your answers to four decimal places, when needed. Descriptive Statistics: LOS, Aspirin, LVSD Standard Standard Variable Mean Error Deviation Minimum Median Maximum LOS (days) Aspirin (%)…arrow_forwardA key hospital outcome measure of clinical performance is length of stay (LOS), that is, the number of days a patient is hospitalized. For patients at one hospital with acute myocardial infarction (heart attack), the length of stay over the past four years has consistently decreased. The hospital also has data for various treatment options such as the percentage of patients who received aspirin upon arrival and cardiac medication for Left Ventricular Systolic Dysfunction (LVSD). The data are as follows: Year Average LOS Aspirin on arrival LVSD medication 2007 4.33 days 89% 2008 4.34 days 94% 2009 4.12 days 97% 2010 4.29 days 98% Calculate descriptive statistics for the data. Do not round intermediate calculations. Round your answers to four decimal places, when needed. Descriptive Statistics: LOS, Aspirin, LVSD Variable LOS (days) Aspirin (%) LVSD (%) Minimum TODO Calculate correlations for the data. Do not round intermediate calculations. Use a minus sign for negative values, if any.…arrow_forward
- A key hospital outcome measure of clinical performance is length of stay (LOS), that is, the number of days a patient is hospitalized. For patients at one hospital with acute myocardial infarction (heart attack), the length of stay over the past four years has consistently decreased. The hospital also has data for various treatment options such as the percentage of patients who received aspirin upon arrival and cardiac medication for Left Ventricular Systolic Dysfunction (LVSD). The data are as follows: Year Average LOS Aspirin on arrival LVSD medication 2007 4.25 days 92% 2008 4.25 days 96% 2009 4.17 days 98% 2010 4.10 days 100% Calculate descriptive statistics for the data. Do not round intermediate calculations. Round your answers to four decimal places, when needed. Descriptive Statistics: LOS, Aspirin, LVSD Correlations: LOS, Aspirin, LVSD LOS Aspirin Aspirin LVSD Variable LOS (days) Aspirin (%) LVSD (%) Calculate correlations for the data. Do not round intermediate calculations.…arrow_forwardA key hospital outcome measure of clinical performance is length of stay (LOS), that is, the number of days a patient is hospitalized. For patients at one hospital with acute myocardial infarction (heart attack), the length of stay over the past four years has consistently decreased. The hospital also has data for various treatment options such as the percentage of patients who received aspirin upon arrival and cardiac medication for Left Ventricular Systolic Dysfunction (LVSD). The data are as follows: Aspirin on arrival Year 2007 2008 2009 2010 Average LOS 4.17 days 4.27 days 4.18 days 4.15 days Calculate descriptive statistics for the data. Do not round intermediate calculations. Round your answers to four decimal places, when needed. Descriptive Statistics: LOS, Aspirin, LVSD Aspirin LVSD Mean Correlations: LOS, Aspirin, LVSD LOS Aspirin 92% 96% 98% 100% LVSD medication Standard Error Variable LOS (days) Aspirin (%) LVSD (%) Calculate correlations for the data. Do not round…arrow_forward
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