Module 7: Basics Of Biostatistics

10 Questions | Total Attempts: 63

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Module 7: Basics Of Biostatistics

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Questions and Answers
  • 1. 
    1-Risk = new cases/population at risk
    • A. 

      True

    • B. 

      False

  • 2. 
    2- Rate= new cases/ person-time at risk
    • A. 

      True

    • B. 

      False

  • 3. 
    3- odds=cases/non-cases
    • A. 

      True

    • B. 

      False

  • 4. 
    4- Group of patients enrolling for a trial had a normal distribution for weight. The mean weight of the patients was 65 kg. For this group the SD was calculated to be 5 kg.This means that 95.4% of the subjects will weigh between: 
    • A. 

      A) 60 and 70 kg

    • B. 

      B) 40 and 90 kg

    • C. 

      C) 50 and 80 kg

    • D. 

      D) 55 and 75 kg

  • 5. 
    5- Percentage may be used to hide the true size of the data in : 
    • A. 

      A) large samples

    • B. 

      B) small samples

    • C. 

      C) representative samples

    • D. 

      D) all answers are correct

  • 6. 
    6- Patients in a control group required more Cataract surgery than those in the intervention group ( 15% vs 8%, p = 0.01) 
    • A. 

      A) result is statistically significant

    • B. 

      B) result is not statistically significant

    • C. 

      C) the is role for chance in the comparison

    • D. 

      D) no answer is correct

  • 7. 
    7-If all patients are 45 years old, the SD will be : 
    • A. 

      A) 45

    • B. 

      B) 45รท2

    • C. 

      C) Zero

    • D. 

      D) 15

  • 8. 
    8-"Standard deviation" means :
    • A. 

      A) measure of spread of data

    • B. 

      B) avoiding comparability between the groups.

    • C. 

      C) the mid- point of data

    • D. 

      D) none of the above

  • 9. 
    9-Normal law means :
    • A. 

      A) there is a relation between the two variables in the study

    • B. 

      B) normal distribution of the majority of biological variables

    • C. 

      C) operationalization of an observed event

    • D. 

      D) all answers are correct

  • 10. 
    10-The disadvantage of conversion from Numerical data to categorical data is:
    • A. 

      A) loss of data

    • B. 

      B) help to make decisions

    • C. 

      C) retain information

    • D. 

      D) increasing bias

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