Biostatistics

44 Questions | Total Attempts: 2704

SettingsSettingsSettings
Please wait...
Biostatistics

Quiz for Public Health test over Biostatistics in Dental Hygiene


Questions and Answers
  • 1. 
    • A. 

      Nominal

    • B. 

      Ordinal

    • C. 

      Interval

    • D. 

      Ratio

  • 2. 
    Types of toothbrushes would be an example of what:
    • A. 

      Nominal

    • B. 

      Ordinal

    • C. 

      Interval

    • D. 

      Ratio

  • 3. 
    Classifications of dental disease is an example of what:
    • A. 

      Nominal

    • B. 

      Ordinal

    • C. 

      Interval

    • D. 

      Ratio

  • 4. 
    Within 3 standard deviations, the mean picks up how much of the scores?
    • A. 

      68

    • B. 

      78

    • C. 

      99

    • D. 

      99.7

    • E. 

      99.9

  • 5. 
    Has categorical variables and bars are separate, but equal distances apart:
    • A. 

      Bar Graph

    • B. 

      Histogram

    • C. 

      Frequency Polygon

  • 6. 
    Has continuous variables, bars touch and you can always find a third value:
    • A. 

      Bar Graph

    • B. 

      Histogram

    • C. 

      Frequency Polygon

  • 7. 
    Within 1 standard deviation, the mean picks up over how many of the values?
    • A. 

      60

    • B. 

      62

    • C. 

      65

    • D. 

      66

    • E. 

      68

  • 8. 
    The degree to which the independent variable alone brings about the change in the dependent variable is what:
    • A. 

      Internal Validity

    • B. 

      External Validity

  • 9. 
    It is reliable if the instrument measures what it claims to be measuring.
    • A. 

      True

    • B. 

      False

  • 10. 
    The students t-test measures what:
    • A. 

      Test the difference between 2 means

    • B. 

      Test for differences between 3 or more means

    • C. 

      Differences between two frequency distributions

    • D. 

      Whether two distributions are independent or dependent

  • 11. 
    The Scientific Method is:
    • A. 

      Qualitatitive Research

    • B. 

      Quantitative Research

  • 12. 
    As income level declines, tooth decay increases. This is an example of what:
    • A. 

      Positive correlation

    • B. 

      Negative correlation

    • C. 

      Internal Validity

    • D. 

      External Validity

  • 13. 
    Randomly selecting a proportionate amount from subgroups is an example of what:
    • A. 

      Random Sampling

    • B. 

      Stratified Sampling

    • C. 

      Systematic Sampling

    • D. 

      Convenience Sampling

  • 14. 
    The degree to which the study accurately reflects events that would occur in a real situation is what:
    • A. 

      Internal Validity

    • B. 

      External Validity

  • 15. 
    Retrospective and Prospective are what types of Epidemiological Studies?
    • A. 

      Analytical

    • B. 

      Descriptive

  • 16. 
    Twins (same group on two or more occasions) would be an example of what kind of epidemiological study?
    • A. 

      Cross-Sectional

    • B. 

      Longtudinal

  • 17. 
    A Correlation Coefficient of 0.90 shows a strong relationship between 2 variables.
    • A. 

      True

    • B. 

      False

  • 18. 
    Within 2 standard deviations, the mean picks up about how many of the values?
    • A. 

      68

    • B. 

      90

    • C. 

      95

    • D. 

      97

    • E. 

      99.7

  • 19. 
    No relationship existing between variables is an example of what:
    • A. 

      Negative Correlation

    • B. 

      Null Hypothesis

    • C. 

      Empirical Consequence

    • D. 

      Research Protocol

  • 20. 
    What type of epidemiological study would be cases of flu at IPFW during the Spring semester?
    • A. 

      Descriptive

    • B. 

      Analytical

  • 21. 
    Empirical Consequences are:
    • A. 

      Statements that reflect a research question

    • B. 

      Verification of Results

    • C. 

      Observable or relying on experiences

    • D. 

      Orderly, controlled plans

  • 22. 
    In systematic sampling, every person has an equal or random chance of being selected.
    • A. 

      True

    • B. 

      False

  • 23. 
    What type of epidemiological study is designed to determine the relationship between a condition and a characteristic shared by some members of a group?
    • A. 

      Prospective

    • B. 

      Retrospective

  • 24. 
    Each member in the population has an equal chance of being selected:
    • A. 

      Random Sampling

    • B. 

      Stratified Sampling

    • C. 

      Systematic Sampling

    • D. 

      Convenience Sampling

  • 25. 
    The data is what if the examiners are calibrated and can reproduce the results?
    • A. 

      Valid

    • B. 

      Reliable

  • 26. 
    Restorations are prevalent, new decay are incidences.
    • A. 

      True

    • B. 

      False

  • 27. 
    The number of new cases of a specific disease within a defined population over a period of time is what:
    • A. 

      Prevalence

    • B. 

      Incidence

  • 28. 
    Which is the effect or result of an experiment?
    • A. 

      Independent variable

    • B. 

      Dependent variable

  • 29. 
    Before and after studies for preventive measures are what:
    • A. 

      Clinical trials

    • B. 

      Field trials

    • C. 

      Demonstration studies

  • 30. 
    Control groups are:
    • A. 

      People with the condition

    • B. 

      People w/o the condition, but similar

  • 31. 
    Systemic water fluoridation will reduce caries in school children by 30%. What is the independent variable?
    • A. 

      Systemic water fluoridation

    • B. 

      Caries

    • C. 

      School children

    • D. 

      30%

  • 32. 
    A zero correlation coefficient shows:
    • A. 

      A strong relationship

    • B. 

      No relationship

  • 33. 
    Discrete data is qualitative in nature. Continuous data is quantitative in nature.
    • A. 

      Both statements are true

    • B. 

      Both statements are false

    • C. 

      The first statement is true, the second is false

    • D. 

      The first statement is false, the second is true

  • 34. 
    Females and males are examples of what kind of data?
    • A. 

      Nominal

    • B. 

      Ordinal

    • C. 

      Interval

    • D. 

      Ratio

  • 35. 
    Descriptive statistics make no attempt to generalize the research findings beyond the immediate sample.
    • A. 

      True

    • B. 

      False

  • 36. 
    The Y (vertical axis) represents frequency.
    • A. 

      True

    • B. 

      False

  • 37. 
    Chi-Square determines probability of categorical data.
    • A. 

      True

    • B. 

      False

  • 38. 
    • A. 

      Nominal

    • B. 

      Ordinal

    • C. 

      Interval

    • D. 

      Ratio

  • 39. 
    Correlation coefficient implies causation.
    • A. 

      True

    • B. 

      False

  • 40. 
    Ordinal data has equal intervals.
    • A. 

      True

    • B. 

      False

  • 41. 
    What type of sample has the least bias?
    • A. 

      Random

    • B. 

      Stratified

    • C. 

      Systematic

    • D. 

      Judgment

    • E. 

      Convenience

  • 42. 
    1/1000 is a stronger proof of chance than 1/500.
    • A. 

      True

    • B. 

      False

  • 43. 
    If P= > the Null Hypothesis is void.
    • A. 

      True

    • B. 

      False

  • 44. 
    What is the most powerful type of data?
    • A. 

      Nominal

    • B. 

      Ratio

    • C. 

      Ordinal

    • D. 

      Interval