Public Health Quiz #14: Pearson Correlation Coefficient
<<
1
2
3
4
5
>>
1.
A study aims to determine the relationship between the number of hours medical students spend studying and their USMLE Step 1 scores. The Pearson correlation coefficient (r) is calculated to be 0.7. Which of the following is the most accurate interpretation of this finding?
A) A strong negative correlation exists between study hours and USMLE Step 1 scores.
B) A strong positive correlation exists between study hours and USMLE Step 1 scores.
C) There is no correlation between study hours and USMLE Step 1 scores.
D) The more hours students study, the lower their USMLE Step 1 scores.
E) USMLE Step 1 scores cause students to study for more hours.
Question 1 of 5
2.
In a study examining the relationship between body mass index (BMI) and fasting blood glucose levels, researchers calculate a Pearson correlation coefficient (r) of -0.4. Which of the following best describes this relationship?
A Pearson correlation coefficient (r) of -0.4 indicates a moderate negative correlation between BMI and fasting blood glucose levels. This means that, on average, as BMI increases, fasting blood glucose levels tend to decrease, and vice versa. However, this correlation coefficient does not imply causation and should not be interpreted as BMI causing changes in fasting blood glucose levels.
B) BMI and fasting blood glucose levels have a moderate negative correlation.
C) BMI and fasting blood glucose levels have a strong negative correlation.
D) There is no correlation between BMI and fasting blood glucose levels.
E) Increasing BMI causes a decrease in fasting blood glucose levels.
Question 2 of 5
3.
Researchers are investigating the correlation between age and maximal oxygen uptake (VO2 max) in a sample of healthy adults. They calculate a Pearson correlation coefficient (r) of -0.85. Which of the following interpretations of this result is correct?
A) Age and VO2 max are unrelated.
B) There is a weak positive correlation between age and VO2 max.
C) There is a strong negative correlation between age and VO2 max.
D) Older age causes a decrease in VO2 max.
E) VO2 max increases with age.
Question 3 of 5
4.
In a study designed to explore the relationship between caffeine consumption and reaction time, a Pearson correlation coefficient (r) of -0.1 is found. How should this correlation be interpreted?
A) Caffeine consumption has a strong negative effect on reaction time.
B) Caffeine consumption and reaction time are strongly positively correlated.
C) There is a weak negative correlation between caffeine consumption and reaction time.
D) Caffeine consumption significantly increases reaction time.
E) There is practically no correlation between caffeine consumption and reaction time.
Question 4 of 5
5.
A study investigates the potential relationship between the duration of daily physical activity and sleep quality. The Pearson correlation coefficient (r) between these two variables is found to be 0.55. What does this indicate about the relationship between daily physical activity and sleep quality?
A) There is a moderate to strong positive correlation between daily physical activity and sleep quality.
B) Physical activity has no impact on sleep quality.
C) There is a strong negative correlation between daily physical activity and sleep quality.
D) There is a strong positive correlation between daily physical activity and sleep quality.
E) Increasing daily physical activity causes significant improvements in sleep quality.
Question 5 of 5
Loading...
¡Por tiempo limitado!
Unete a nuestro boletín mensual y obtén todos nuestros talleres USMLE/ECFMG ¡GRATIS! (+100 videos)
Nombre
Email
Profesión
Estudiante de Medicina
Medico Interno o Medico Rural
Medico Graduado
Otro Profesional de la Salud
Quiero el taller gratuito
¡Únete a nuestra comunidad de IMGs!
¡Obtén actualizaciones mensuales USMLE y ECFMG, además, obtén un taller USMLE gratis al instante!
"Taller 01: ¿Qué es el USMLE?”
Nombre
Email
Quiero el taller gratuito
Taller Gratuito USMLE
Este taller proporciona un análisis en profundidad de todos los exámenes USMLE, consejos para tomar exámenes y cómo estudiar de manera efectiva.
OFERTA POR TIEMPO LIMITADO
Nombre
Email
Usuario
Contraseña
Quiero el curso gratuito
Especialista ECFMG: Dr. Carla Rebeca Lainez Casal
Facultad de Medicina: Universidad Catholica de Santiago de Guayaquil
ECFMG Certification date: October 13, 2022.
Residency: 2023 Internal Medicine Applicant
+1 7542724970