# Biostatistics

44 Questions | Total Attempts: 2704  Settings  Quiz for Public Health test over Biostatistics in Dental Hygiene

Related Topics
• 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