Q12)All of the following are reasons to conduct a cohort study except:
Anonymous Quiz
17%
A) To determine the incidence of disease in an exposed population
17%
B) To establish a cause-and-effect relationship between exposure and outcome
63%
C) To study rare diseases
3%
D) To examine multiple outcomes
A researcher collected the following data on the number of hours spent studying per week by five students: 8, 10, 12, 14, and 16 hours. What is the sample average (mean) number of hours spent studying per week?
Anonymous Quiz
81%
A) 12 hours
6%
B) 11.6 hours
6%
C) 13 hours
6%
D) 12.5 hours
A researcher collects data on the number of daily steps taken by 11 individuals: 3500, 4200, 4700, 5000, 5200, 5400, 5600, 5800, 6300, 6700, and 15000. What is the median number of steps taken?
A researcher records the number of books read by a group of 15 students over the summer: 3, 4, 2, 3, 5, 4, 4, 6, 2, 4, 7, 3, 4, 3, 5. What is the mode of the number of books read by the students?
*Always remember that :
1)the average sample is the mean.
2)If we have 2, 2, 3, 3, 4, 4, 5, 5, all of them are modes.
3) ordered data when median or Quartiles are required.
1)the average sample is the mean.
2)If we have 2, 2, 3, 3, 4, 4, 5, 5, all of them are modes.
3) ordered data when median or Quartiles are required.
A researcher records the following data set representing the number of hours spent on a project by 12 participants: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24. Calculate the quartiles Q1, Q2 (median), and Q3 for this data set.
Given the following data set representing the number of hours studied per week by 8 students: 5, 7, 8, 12, 14, 15, 18, 20. What is the range of this data set?
Anonymous Quiz
0%
A) 12
86%
B) 15
14%
C) 10
0%
D) 20
For the data set: 4, 8, 6, 5, 7. What is the standard deviation of this data set?
Anonymous Quiz
0%
A) 2.50
11%
B) 1.25
22%
C) 2.00
67%
D) 1.58
For the following data set: 3, 7, 8, 5, 10, calculate the variance.
Anonymous Quiz
43%
A) 7.3
43%
B) 8.16
14%
C) 6
0%
D) 9.60
If the mean of a data set is 50 and the standard deviation is 8, what is the coefficient of variation (C.V.) of the data set?
Anonymous Quiz
8%
A) 12%
15%
B) 14%
77%
C) 16%
0%
D) 20%
For the following data sets: 3, 7, 8, 5, 12, 20, 18, 15, 33, 24 calculate the interquartile range (IQR).
Anonymous Quiz
0%
A)10
67%
B)16
11%
C)15
22%
D)12
In a study of 1,000 individuals, 120 were found to have a particular chronic condition. If, during a follow-up period of 2 years, 30 new cases of the condition were diagnosed, what is the prevalence of the condition at the end of the study period?
Anonymous Quiz
18%
A) 12%
73%
B) 15%
9%
C) 18%
0%
D) 20%
A study is conducted in a town with a population of 5,000 individuals. At the start of the year, 200 individuals are known to have a chronic disease. During the year, 40 new cases of the disease are diagnosed.Calculate the incidence rate.
Anonymous Quiz
56%
A).83%
0%
B).9%
11%
C)1%
33%
D)3.5%
A screening test for a particular disease is conducted in a population of 10,000 individuals. The True Positives (TP): 120, False Negatives (FN): 300, False Positives (FP): 80
Based on the given data, answer the following questions:
Based on the given data, answer the following questions: